Moving SwiftShader from component to bundled library

Multiple things are modified here:
- The SwiftShader component was entirely removed
- The kSwiftShaderPath switch was removed, since SwiftShader
  will now be in a constant location
- SwiftShader files were added to FILES.cfg and chrome.release

BUG=630728
[email protected]
TBR_REASON=This is only for changes in gpu_data_manager.h, which are trivial

Review-Url: https://codereview.chromium.org/2715563002
Cr-Commit-Position: refs/heads/master@{#456764}
diff --git a/content/browser/BUILD.gn b/content/browser/BUILD.gn
index b094f61..a3687b7b 100644
--- a/content/browser/BUILD.gn
+++ b/content/browser/BUILD.gn
@@ -148,6 +148,7 @@
     "//ui/gfx/geometry",
     "//ui/gfx/geometry/mojo",
     "//ui/gl",
+    "//ui/gl:gl_features",
     "//ui/native_theme",
     "//ui/resources",
     "//ui/shell_dialogs",
@@ -1593,6 +1594,7 @@
     deps += [
       "//third_party/iaccessible2",
       "//third_party/isimpledom",
+      "//third_party/swiftshader",
     ]
     libs += [
       "comctl32.lib",