Make CSSParserContext be garbage collected.

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

Index: third_party/WebKit/Source/core/css/ActiveStyleSheetsTest.cpp
diff --git a/third_party/WebKit/Source/core/css/ActiveStyleSheetsTest.cpp b/third_party/WebKit/Source/core/css/ActiveStyleSheetsTest.cpp
index e22465a47af3244bd13fecf72073298873e17a02..f226d909799a279b6f20271effa0e9e7e36dfee5 100644
--- a/third_party/WebKit/Source/core/css/ActiveStyleSheetsTest.cpp
+++ b/third_party/WebKit/Source/core/css/ActiveStyleSheetsTest.cpp
@@ -23,7 +23,7 @@ class ActiveStyleSheetsTest : public ::testing::Test {
  protected:
   static CSSStyleSheet* createSheet(const String& cssText = String()) {
     StyleSheetContents* contents =
-        StyleSheetContents::create(CSSParserContext(HTMLStandardMode, nullptr));
+        StyleSheetContents::create(new CSSParserContext(HTMLStandardMode));

[haraken, 2017/01/12 04:51:13]

Blink prefers a factory pattern. Can you replace all the new statements with
CSSParserContext::create()?

[Bret, 2017/01/13 02:15:28]

Done.

     contents->parseString(cssText);
     contents->ensureRuleSet(MediaQueryEvaluator(),
                             RuleHasDocumentSecurityOrigin);