Make CSSParserContext be garbage collected.

third_party/WebKit/Source/core/css/StyleSheetContentsTest.cpp

 // Copyright 2016 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/css/StyleSheetContents.h"
 
 #include "core/css/CSSTestHelper.h"
 #include "core/css/parser/CSSParser.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 
 TEST(StyleSheetContentsTest, InsertMediaRule) {
-  CSSParserContext context(HTMLStandardMode, nullptr);
+  CSSParserContext* context = CSSParserContext::create(HTMLStandardMode);
 
   StyleSheetContents* styleSheet = StyleSheetContents::create(context);
   styleSheet->parseString("@namespace ns url(test);");
   EXPECT_EQ(1U, styleSheet->ruleCount());
 
   styleSheet->setMutable();
   styleSheet->wrapperInsertRule(
       CSSParser::parseRule(context, styleSheet,
                            "@media all { div { color: pink } }"),
       0);
   EXPECT_EQ(1U, styleSheet->ruleCount());
   EXPECT_TRUE(styleSheet->hasMediaQueries());
 
   styleSheet->wrapperInsertRule(
       CSSParser::parseRule(context, styleSheet,
                            "@media all { div { color: green } }"),
       1);
   EXPECT_EQ(2U, styleSheet->ruleCount());
   EXPECT_TRUE(styleSheet->hasMediaQueries());
 }
 
 TEST(StyleSheetContentsTest, InsertFontFaceRule) {
-  CSSParserContext context(HTMLStandardMode, nullptr);
+  CSSParserContext* context = CSSParserContext::create(HTMLStandardMode);
 
   StyleSheetContents* styleSheet = StyleSheetContents::create(context);
   styleSheet->parseString("@namespace ns url(test);");
   EXPECT_EQ(1U, styleSheet->ruleCount());
 
   styleSheet->setMutable();
   styleSheet->wrapperInsertRule(
       CSSParser::parseRule(context, styleSheet,
                            "@font-face { font-family: a }"),
       0);
   EXPECT_EQ(1U, styleSheet->ruleCount());
   EXPECT_TRUE(styleSheet->hasFontFaceRule());
 
   styleSheet->wrapperInsertRule(
       CSSParser::parseRule(context, styleSheet,
                            "@font-face { font-family: b }"),
       1);
   EXPECT_EQ(2U, styleSheet->ruleCount());
   EXPECT_TRUE(styleSheet->hasFontFaceRule());
 }
 
 TEST(StyleSheetContentsTest, HasViewportRule) {
-  CSSParserContext context(HTMLStandardMode, nullptr);
+  CSSParserContext* context = CSSParserContext::create(HTMLStandardMode);
 
   StyleSheetContents* styleSheet = StyleSheetContents::create(context);
   styleSheet->parseString("@viewport { width: 200px}");
   EXPECT_EQ(1U, styleSheet->ruleCount());
   EXPECT_TRUE(styleSheet->hasViewportRule());
 }
 
 TEST(StyleSheetContentsTest, HasViewportRuleAfterInsertion) {
-  CSSParserContext context(HTMLStandardMode, nullptr);
+  CSSParserContext* context = CSSParserContext::create(HTMLStandardMode);
 
   StyleSheetContents* styleSheet = StyleSheetContents::create(context);
   styleSheet->parseString("body { color: pink }");
   EXPECT_EQ(1U, styleSheet->ruleCount());
   EXPECT_FALSE(styleSheet->hasViewportRule());
 
   styleSheet->setMutable();
   styleSheet->wrapperInsertRule(
       CSSParser::parseRule(context, styleSheet, "@viewport { width: 200px }"),
       0);
   EXPECT_EQ(2U, styleSheet->ruleCount());
   EXPECT_TRUE(styleSheet->hasViewportRule());
 }
 
 TEST(StyleSheetContentsTest, HasViewportRuleAfterInsertionIntoMediaRule) {
-  CSSParserContext context(HTMLStandardMode, nullptr);
+  CSSParserContext* context = CSSParserContext::create(HTMLStandardMode);
 
   StyleSheetContents* styleSheet = StyleSheetContents::create(context);
   styleSheet->parseString("@media {}");
   ASSERT_EQ(1U, styleSheet->ruleCount());
   EXPECT_FALSE(styleSheet->hasViewportRule());
 
   StyleRuleMedia* mediaRule = toStyleRuleMedia(styleSheet->ruleAt(0));
   styleSheet->setMutable();
   mediaRule->wrapperInsertRule(
       0,
       CSSParser::parseRule(context, styleSheet, "@viewport { width: 200px }"));
   EXPECT_EQ(1U, mediaRule->childRules().size());
   EXPECT_TRUE(styleSheet->hasViewportRule());
 }
 
 }  // namespace blink