Android: Create a chrome flag for drawing vertically full contents

The newly added flags, if turned on, draws contents vertically from edge
to edge.

Bug: 937946
Change-Id: I65676bb52b6daf3d788cea145ded8dd3ed4fca9d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1528063
Commit-Queue: Jinsuk Kim <[email protected]>
Reviewed-by: Theresa <[email protected]>
Cr-Commit-Position: refs/heads/master@{#642781}
diff --git a/chrome/browser/flag_descriptions.cc b/chrome/browser/flag_descriptions.cc
index 15365bf..1ed73707 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -81,6 +81,11 @@
 const char kDelegateOverscrollSwipesDescription[] =
     "Delegate overscroll swipes to websites first";
 
+const char kDrawVerticallyEdgeToEdgeName[] =
+    "Draw contents vertically from edge to edge.";
+const char kDrawVerticallyEdgeToEdgeDescription[] =
+    "Draw contents vertically from edge to edge.";
+
 const char kEnableBlinkHeapUnifiedGarbageCollectionName[] =
     "Blink Heap Unified Garbage Collection";
 const char kEnableBlinkHeapUnifiedGarbageCollectionDescription[] =