createFragmentFromMarkupWithContext() should use EphemeralRange.

third_party/WebKit/Source/core/editing/serializers/Serialization.cpp

Index: third_party/WebKit/Source/core/editing/serializers/Serialization.cpp
diff --git a/third_party/WebKit/Source/core/editing/serializers/Serialization.cpp b/third_party/WebKit/Source/core/editing/serializers/Serialization.cpp
index 794b7cedd64da049c5e3a5630dec9f97d295c63d..797c7bcaf730a48f0917e0d64e669c5ef2062c80 100644
--- a/third_party/WebKit/Source/core/editing/serializers/Serialization.cpp
+++ b/third_party/WebKit/Source/core/editing/serializers/Serialization.cpp
@@ -408,12 +408,11 @@ DocumentFragment* createFragmentFromMarkupWithContext(
   root->appendChild(taggedFragment);
   taggedDocument->appendChild(root);
 
-  Range* range = Range::create(
-      *taggedDocument,
+  EphemeralRange range = EphemeralRange(

[Xiaocheng, 2017/03/02 20:00:16]

nit: Initialize range as either

const EphemeralRange range(..., ...);

or

const EphemeralRange& range = ...;

       Position::afterNode(nodeBeforeContext).parentAnchoredEquivalent(),
       Position::beforeNode(nodeAfterContext).parentAnchoredEquivalent());
 
-  Node* commonAncestor = range->commonAncestorContainer();
+  Node* commonAncestor = range.commonAncestorContainer();
   HTMLElement* specialCommonAncestor =
       ancestorToRetainStructureAndAppearanceWithNoLayoutObject(commonAncestor);