Update "LayoutTests" / "layout test" in docs/*.md.

This CL renames the following md files:
 - layout_tests_linux -> web_tests_linux.md
 - how_to_extend_layout_test_framework.md ->
   how_to_extend_web_test_framework.md
 - testing/layout_test_baseline_fallback.md ->
   testing/web_test_baseline_fallback.md
 - testing/layout_test_expectations.md -> testing/web_test_expectations.md
 - testing/layout_tests.md -> testing/web_tests.md
 - testing/layout_tests_in_content_shell.md ->
   testing/web_tests_in_content_shell.md
 - testing/layout_tests_tips.md -> testing/web_tests_tips.md
 - testing/layout_tests_with_manual_fallback.md ->
   testing/web_tests_with_manual_fallback.md
 - testing/writing_layout_tests -> testing/writing_web_tests.md

No-Try: true
Change-Id: Ied34815c92e449888b20818540a5ed0a76107bd1
Bug: 843412
Reviewed-on: https://chromium-review.googlesource.com/c/1350559
Commit-Queue: Kent Tamura <[email protected]>
Reviewed-by: Quinten Yearsley <[email protected]>
Cr-Commit-Position: refs/heads/master@{#611024}
diff --git a/third_party/blink/web_tests/ASANExpectations b/third_party/blink/web_tests/ASANExpectations
index c74e864..a753424 100644
--- a/third_party/blink/web_tests/ASANExpectations
+++ b/third_party/blink/web_tests/ASANExpectations
@@ -1,7 +1,7 @@
 # This file is used for tests that only need to be suppressed on
 # the Chromium WebKit ASAN bots.
 # Further documentation:
-# https://chromium.googlesource.com/chromium/src/+/master/docs/testing/layout_test_expectations.md
+# https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_test_expectations.md
 
 # NULL deref in libflashplayer.so, http://crbug.com/145940
 # ==12527== ERROR: AddressSanitizer: SEGV on unknown address 0x7f628058b38b
diff --git a/third_party/blink/web_tests/LeakExpectations b/third_party/blink/web_tests/LeakExpectations
index db13c500..30c76b6 100644
--- a/third_party/blink/web_tests/LeakExpectations
+++ b/third_party/blink/web_tests/LeakExpectations
@@ -1,7 +1,7 @@
 # This file is used for tests that only need to be suppressed on the Chromium
 # WebKit Leak bots.
 # Further documentation:
-# https://chromium.googlesource.com/chromium/src/+/master/docs/testing/layout_test_expectations.md
+# https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_test_expectations.md
 
 ###########################################################################
 # WARNING: Memory leaks must be fixed asap. Sheriff is expected to revert #
diff --git a/third_party/blink/web_tests/MSANExpectations b/third_party/blink/web_tests/MSANExpectations
index 93a5622..05a3b7e6 100644
--- a/third_party/blink/web_tests/MSANExpectations
+++ b/third_party/blink/web_tests/MSANExpectations
@@ -1,7 +1,7 @@
 # This file is used for tests that only need to be suppressed on
 # the Chromium Blink MSan bots.
 # Further documentation:
-# https://chromium.googlesource.com/chromium/src/+/master/docs/testing/layout_test_expectations.md
+# https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_test_expectations.md
 
 # Those stress V8's simulator, making them very slow under MSan.
 crbug.com/420198 [ Linux ] fast/js/regress [ Skip ]
diff --git a/third_party/blink/web_tests/NeverFixTests b/third_party/blink/web_tests/NeverFixTests
index 55d0a62..335216f6 100644
--- a/third_party/blink/web_tests/NeverFixTests
+++ b/third_party/blink/web_tests/NeverFixTests
@@ -8,7 +8,7 @@
 #   6. Tests that fail due to Debug rendering variations from Release behavior.
 #   7. Tests that are not meant to be run automatically (manual tests).
 #   8. Tests that are automatically imported but not intended to be run.
-# https://chromium.googlesource.com/chromium/src/+/master/docs/testing/layout_test_expectations.md
+# https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_test_expectations.md
 
 # FIXME: Remove the WontFix keyword and have that be implied for tests in this file.
 
diff --git a/third_party/blink/web_tests/SlowTests b/third_party/blink/web_tests/SlowTests
index 9b30aa2..07d5871 100644
--- a/third_party/blink/web_tests/SlowTests
+++ b/third_party/blink/web_tests/SlowTests
@@ -6,7 +6,7 @@
 # than 2 seconds in Release mode or 6 seconds in Debug mode should be listed here.
 #
 # Further documentation:
-# https://chromium.googlesource.com/chromium/src/+/master/docs/testing/layout_test_expectations.md
+# https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_test_expectations.md
 
 crbug.com/24182 storage/indexeddb/objectstore-cursor.html [ Slow ]
 crbug.com/24182 storage/indexeddb/mozilla/test_objectStore_openKeyCursor.html [ Slow ]
diff --git a/third_party/blink/web_tests/StaleTestExpectations b/third_party/blink/web_tests/StaleTestExpectations
index 7e5823a..3c06553f 100644
--- a/third_party/blink/web_tests/StaleTestExpectations
+++ b/third_party/blink/web_tests/StaleTestExpectations
@@ -5,7 +5,7 @@
 # Feel free to take ownership of any of these lines and get the test passing.
 #
 # Further documentation:
-# https://chromium.googlesource.com/chromium/src/+/master/docs/testing/layout_test_expectations.md
+# https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_test_expectations.md
 
 # We could fix this test for us and upstream it if the test shell user agent
 # would let us differentiate test_shell and WebKit DumpTreeNode.
diff --git a/third_party/blink/web_tests/TestExpectations b/third_party/blink/web_tests/TestExpectations
index b5197fde..6981575 100644
--- a/third_party/blink/web_tests/TestExpectations
+++ b/third_party/blink/web_tests/TestExpectations
@@ -1,6 +1,6 @@
 # This is the main failure suppression file for Blink LayoutTests.
 # Further documentation:
-# https://chromium.googlesource.com/chromium/src/+/master/docs/testing/layout_test_expectations.md
+# https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_test_expectations.md
 
 # Intentional failures to test the layout test system.
 Bug(intentional) harness-tests/crash.html [ Crash ]
diff --git a/third_party/blink/web_tests/W3CImportExpectations b/third_party/blink/web_tests/W3CImportExpectations
index 231f1fd..635fc02 100644
--- a/third_party/blink/web_tests/W3CImportExpectations
+++ b/third_party/blink/web_tests/W3CImportExpectations
@@ -7,7 +7,7 @@
 # used to make it easier to work on getting them running and passing.
 #
 # Further documentation:
-# https://chromium.googlesource.com/chromium/src/+/master/docs/testing/layout_test_expectations.md
+# https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_test_expectations.md
 
 external/wpt/.codecov.yml [ Skip ]
 external/wpt/.gitmodules [ Skip ]
diff --git a/third_party/blink/web_tests/accessibility/readme.md b/third_party/blink/web_tests/accessibility/readme.md
index a02d46f7..0f4bf61c 100644
--- a/third_party/blink/web_tests/accessibility/readme.md
+++ b/third_party/blink/web_tests/accessibility/readme.md
@@ -1,13 +1,13 @@
-# LayoutTests for Accessibility
+# Web Tests for Accessibility
 
-## General Info on LayoutTests: Building and Running the Tests
+## General Info on web tests: Building and Running the Tests
 
-See [Layout Tests](/docs/testing/layout_tests.md) for general
-info on how to build and run layout tests.
+See [Web Tests](/docs/testing/web_tests.md) for general
+info on how to build and run web tests.
 
 ## Old vs. New
 
-There are two styles of accessibility layout tests:
+There are two styles of accessibility web tests:
 
 * Using a ```-expected.txt``` (now deprecated)
 * Unit-style tests with assertions
diff --git a/third_party/blink/web_tests/fast/harness/results.html b/third_party/blink/web_tests/fast/harness/results.html
index 47df65f4..35656738 100644
--- a/third_party/blink/web_tests/fast/harness/results.html
+++ b/third_party/blink/web_tests/fast/harness/results.html
@@ -232,7 +232,7 @@
   <h4>2. TestExpectations</a></h4>
 <pre><a href="#">crbug.com/bug</a> layout/test/path/<a href="#">test.html</a> [ Status ]</pre>
   <p>TestExpectationsshow lines as they'd appear in <a
-    href="https://chromium.googlesource.com/chromium/src/+/master/docs/testing/layout_test_expectations.md">TestExpectations</a> file.</p>
+    href="https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_test_expectations.md">TestExpectations</a> file.</p>
 
   <p>The interesting part here is [ Status ]. Inside TestExpectations file, [ Status ]
   can have multiple values, representing all expected results. For example:</p>
@@ -548,7 +548,7 @@
 
   printExpectation: (test, path, traversal) => {
     // TestExpectations file format is documented at:
-    // https://chromium.googlesource.com/chromium/src/+/master/docs/testing/layout_test_expectations.md
+    // https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_test_expectations.md
 
     let pathParser = new PathParser(path);
     // Print directory header if this test's directory is different from the last.
diff --git a/third_party/blink/web_tests/http/tests/websocket/throttling.html b/third_party/blink/web_tests/http/tests/websocket/throttling.html
index 55f9b54..7a9b9ac3 100644
--- a/third_party/blink/web_tests/http/tests/websocket/throttling.html
+++ b/third_party/blink/web_tests/http/tests/websocket/throttling.html
@@ -14,7 +14,7 @@
 // These tests will not function correctly without the --run-web-tests
 // option. To debug them interactively you can follow the instructions for a
 // "legacy test" in
-// https://chromium.googlesource.com/chromium/src/+/master/docs/testing/layout_tests.md#Debugging-DevTools-Tests.
+// https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_tests.md#Debugging-DevTools-Tests.
 
 async_test(t => {
   const startTime = Date.now();
diff --git a/third_party/blink/web_tests/resources/compositor-controls.js b/third_party/blink/web_tests/resources/compositor-controls.js
index 97574f99..bdac494 100644
--- a/third_party/blink/web_tests/resources/compositor-controls.js
+++ b/third_party/blink/web_tests/resources/compositor-controls.js
@@ -1,6 +1,6 @@
 // To make sure animation events get processed, periodic lifecycle phase runs
 // will include rasterization. See
-// https://chromium.googlesource.com/chromium/src/+/master/docs/testing/writing_layout_tests.md
+// https://chromium.googlesource.com/chromium/src/+/master/docs/testing/writing_web_tests.md
 // for more information.
 function setAnimationRequiresRaster() {
   if (window.testRunner) {