Trace category groups and category filter.

content/browser/devtools/devtools_tracing_handler.cc

 // Copyright (c) 2012 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 "content/browser/devtools/devtools_tracing_handler.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/location.h"
 #include "base/values.h"
@@ skipping 42 matching lines @@
   error_object->SetInteger("code", -1);
   error_object->SetString("message", "Invalid method");
 
   *error_out = error_object;
 
   return NULL;
 }
 
 base::Value* DevToolsTracingHandler::Start(
     const base::DictionaryValue* params) {
-  std::string categories;
+  std::string tag_patterns;
   if (params && params->HasKey("categories"))

[rterrazas, 2013/01/15 08:11:48]

Didn't rename key because I couldn't find where it's set using git grep, maybe
it's in other repo?. Should I even worry about that key?.

-    params->GetString("categories", &categories);
-  TraceController::GetInstance()->BeginTracing(this, categories);
+    params->GetString("categories", &tag_patterns);
+  TraceController::GetInstance()->BeginTracing(this, tag_patterns);
 
   return base::Value::CreateBooleanValue(true);
 }
 
 base::Value* DevToolsTracingHandler::End(
     const base::DictionaryValue* /* params */) {
   TraceController::GetInstance()->EndTracingAsync(this);
 
   return base::Value::CreateBooleanValue(true);
 }
@@ skipping 16 matching lines @@
     ret.append(*i);
   }
   buffer_.clear();
   has_completed_ = false;
   buffer_data_size_ = 0;
 
   return base::Value::CreateStringValue(ret);
 }
 
 }  // namespace content