Fix font-size shaking issue in some pages

third_party/WebKit/Source/core/layout/TextAutosizer.cpp

Index: third_party/WebKit/Source/core/layout/TextAutosizer.cpp
diff --git a/third_party/WebKit/Source/core/layout/TextAutosizer.cpp b/third_party/WebKit/Source/core/layout/TextAutosizer.cpp
index f5212eae17562d8b2aae16ef684c1eb540d2f923..6f0e83dde2e6cb3f4ce984a4a9216a8b860f3078 100644
--- a/third_party/WebKit/Source/core/layout/TextAutosizer.cpp
+++ b/third_party/WebKit/Source/core/layout/TextAutosizer.cpp
@@ -1009,6 +1009,11 @@ const LayoutBlock* TextAutosizer::DeepestBlockContainingAllText(
 // FIXME: Refactor this to look more like TextAutosizer::deepestCommonAncestor.
 const LayoutBlock* TextAutosizer::DeepestBlockContainingAllText(
     const LayoutBlock* root) const {
+  // To avoid font-size shaking caused by the change of LayoutView's
+  // DeepestBlockContainingAllText.
+  if (root->IsLayoutView())
+    return root;
+
   size_t first_depth = 0;
   const LayoutObject* first_text_leaf = FindTextLeaf(root, first_depth, kFirst);
   if (!first_text_leaf)