Move traced_value.* from cc/debug/ to base/debug/

base/debug/traced_value.h

 // Copyright 2013 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.
 
-#ifndef CC_DEBUG_TRACED_VALUE_H_
-#define CC_DEBUG_TRACED_VALUE_H_
+#ifndef BASE_DEBUG_TRACED_VALUE_H_
+#define BASE_DEBUG_TRACED_VALUE_H_
 
 #include <string>
 
 #include "base/debug/trace_event.h"
 #include "base/memory/scoped_ptr.h"
 
 namespace base {
 class DictionaryValue;
 class Value;
-}
-namespace cc {
+namespace debug {
 
-class TracedValue : public base::debug::ConvertableToTraceFormat {
+// This class is used to convert base::Value to a ConvertableToTraceFormat
+// object. It allows to build the argument value at the point of instrumenation
+// and postpone costly part of its serialization until the tracing is stopped.
+class BASE_EXPORT TracedValue : public base::debug::ConvertableToTraceFormat {
  public:
   static scoped_ptr<base::Value> CreateIDRef(const void* id);
-  static void MakeDictIntoImplicitSnapshot(
-      base::DictionaryValue* dict, const char* object_name, const void* id);
+  static void MakeDictIntoImplicitSnapshot(base::DictionaryValue* dict,
+                                           const char* object_name,
+                                           const void* id);
   static void MakeDictIntoImplicitSnapshotWithCategory(
       const char* category,
       base::DictionaryValue* dict,
       const char* object_name,
       const void* id);
   static void MakeDictIntoImplicitSnapshotWithCategory(
       const char* category,
       base::DictionaryValue* dict,
       const char* object_base_type_name,
       const char* object_name,
       const void* id);
   static scoped_refptr<base::debug::ConvertableToTraceFormat> FromValue(
       base::Value* value);
 
   virtual void AppendAsTraceFormat(std::string* out) const OVERRIDE;
 
  private:
   explicit TracedValue(base::Value* value);
   virtual ~TracedValue();
 
   scoped_ptr<base::Value> value_;
 
   DISALLOW_COPY_AND_ASSIGN(TracedValue);
 };
 
-}  // namespace cc
+}  // namespace debug
+}  // namespace base
 
-#endif  // CC_DEBUG_TRACED_VALUE_H_
+#endif  // BASE_DEBUG_TRACED_VALUE_H_