Add separate blink_style category to blink style tracing

Source/core/css/parser/CSSParserImpl.cpp

 // Copyright 2014 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 "config.h"
 #include "core/css/parser/CSSParserImpl.h"
 
 #include "core/css/CSSKeyframesRule.h"
 #include "core/css/CSSStyleSheet.h"
 #include "core/css/StylePropertySet.h"
@@ skipping 107 matching lines @@
         return nullptr; // Parse error, failed to consume rule
     range.consumeWhitespace();
     if (!rule || !range.atEnd())
         return nullptr; // Parse error, trailing garbage
     return rule;
 }
 
 void CSSParserImpl::parseStyleSheet(const String& string, const CSSParserContext& context, StyleSheetContents* styleSheet)
 {
     TRACE_EVENT_BEGIN2(
-        "blink", "CSSParserImpl::parseStyleSheet",
+        "blink,blink_style", "CSSParserImpl::parseStyleSheet",
         "baseUrl", context.baseURL().string().utf8(),
         "mode", context.mode());
 
-    TRACE_EVENT_BEGIN0("blink", "CSSParserImpl::parseStyleSheet.tokenize");
+    TRACE_EVENT_BEGIN0("blink,blink_style", "CSSParserImpl::parseStyleSheet.tokenize");
     CSSTokenizer::Scope scope(string);
-    TRACE_EVENT_END0("blink", "CSSParserImpl::parseStyleSheet.tokenize");
+    TRACE_EVENT_END0("blink,blink_style", "CSSParserImpl::parseStyleSheet.tokenize");
 
-    TRACE_EVENT_BEGIN0("blink", "CSSParserImpl::parseStyleSheet.parse");
+    TRACE_EVENT_BEGIN0("blink,blink_style", "CSSParserImpl::parseStyleSheet.parse");
     CSSParserImpl parser(context, styleSheet);
     bool firstRuleValid = parser.consumeRuleList(scope.tokenRange(), TopLevelRuleList, [&styleSheet](PassRefPtrWillBeRawPtr<StyleRuleBase> rule) {
         if (rule->isCharsetRule())
             return;
         styleSheet->parserAppendRule(rule);
     });
     styleSheet->setHasSyntacticallyValidCSSHeader(firstRuleValid);
-    TRACE_EVENT_END0("blink", "CSSParserImpl::parseStyleSheet.parse");
+    TRACE_EVENT_END0("blink,blink_style", "CSSParserImpl::parseStyleSheet.parse");
 
     TRACE_EVENT_END2(
-        "blink", "CSSParserImpl::parseStyleSheet",
+        "blink,blink_style", "CSSParserImpl::parseStyleSheet",
         "tokenCount", scope.tokenCount(),
         "length", string.length());
 }
 
 PassOwnPtr<Vector<double>> CSSParserImpl::parseKeyframeKeyList(const String& keyList)
 {
     return consumeKeyframeKeyList(CSSTokenizer::Scope(keyList).tokenRange());
 }
 
 bool CSSParserImpl::supportsDeclaration(CSSParserTokenRange& range)
@@ skipping 588 matching lines @@
         else
             return nullptr; // Parser error, invalid value in keyframe selector
         if (range.atEnd())
             return result.release();
         if (range.consume().type() != CommaToken)
             return nullptr; // Parser error
     }
 }
 
 } // namespace blink