Use mayNotBeMainThread() for wrapper optimization

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/editing/VisibleUnits.h"
 
 #include "core/dom/Text.h"
 #include "core/editing/EditingTestBase.h"
 #include "core/editing/VisiblePosition.h"
 #include "core/html/TextControlElement.h"
@@ skipping 89 matching lines @@
       toLayoutTextFragment(associatedLayoutObjectOf(*text, 2));
   EXPECT_EQ(layoutObject0, layoutObject2)
       << "close parenthesis should be part of first letter.";
 
   LayoutTextFragment* layoutObject3 =
       toLayoutTextFragment(associatedLayoutObjectOf(*text, 3));
   EXPECT_TRUE(layoutObject3->isRemainingTextLayoutObject());
 }
 
 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);
 
   Node* sample = document().getElementById("sample");
   Node* firstLetter = sample->firstChild();
   // Split "abc" into "a" "bc"
   toText(firstLetter)->splitText(1, ASSERT_NO_EXCEPTION);
   updateAllLifecyclePhases();
 
@@ skipping 1238 matching lines @@
                 Position::lastPositionInNode(sample->parentNode())));
   EXPECT_EQ(
       Position(sample, 6),
       mostBackwardCaretPosition(Position::afterNode(sample->parentNode())));
   EXPECT_EQ(Position::lastPositionInNode(document().body()),
             mostBackwardCaretPosition(
                 Position::lastPositionInNode(document().body())));
 }
 
 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);
 
   Node* sample = document().getElementById("sample");
   Node* firstLetter = sample->firstChild();
   // Split "abc" into "a" "bc"
   Text* remaining = toText(firstLetter)->splitText(1, ASSERT_NO_EXCEPTION);
   updateAllLifecyclePhases();
 
@@ skipping 637 matching lines @@
 TEST_F(VisibleUnitsTest, localSelectionRectOfPositionTemplateNotCrash) {
   setBodyContent("<div>foo<img></div>");
 
   Node* node = document().querySelector("img");
   IntRect rect = absoluteSelectionBoundsOf(VisiblePosition::create(
       PositionWithAffinity(Position(node, PositionAnchorType::AfterChildren))));
   EXPECT_FALSE(rect.isEmpty());
 }
 
 }  // namespace blink