Use mayNotBeMainThread() for wrapper optimization

third_party/WebKit/Source/core/editing/VisibleUnitsTest.cpp

Index: third_party/WebKit/Source/core/editing/VisibleUnitsTest.cpp
diff --git a/third_party/WebKit/Source/core/editing/VisibleUnitsTest.cpp b/third_party/WebKit/Source/core/editing/VisibleUnitsTest.cpp
index 93c9e3b3b4ce83c460d0ee7a2d0bbf914f48f061..09be59c7a6d29231e1409e0c0fb0f9a55f31c0bd 100644
--- a/third_party/WebKit/Source/core/editing/VisibleUnitsTest.cpp
+++ b/third_party/WebKit/Source/core/editing/VisibleUnitsTest.cpp
@@ -107,6 +107,9 @@ TEST_F(VisibleUnitsTest, associatedLayoutObjectOfFirstLetterPunctuations) {
 }
 
 TEST_F(VisibleUnitsTest, associatedLayoutObjectOfFirstLetterSplit) {
+  ScriptState* scriptState = ScriptState::forMainWorld(document().frame());
+  ScriptState::Scope scope(scriptState);
+
   const char* bodyContent =
       "<style>p:first-letter {color:red;}</style><p id=sample>abc</p>";
   setBodyContent(bodyContent);
@@ -1365,6 +1368,9 @@ TEST_F(VisibleUnitsTest, mostBackwardCaretPositionFirstLetter) {
 }
 
 TEST_F(VisibleUnitsTest, mostBackwardCaretPositionFirstLetterSplit) {
+  ScriptState* scriptState = ScriptState::forMainWorld(document().frame());
+  ScriptState::Scope scope(scriptState);
+
   const char* bodyContent =
       "<style>p:first-letter {color:red;}</style><p id=sample>abc</p>";
   setBodyContent(bodyContent);