Allow chrome trace to be collected when atrace is enabled.

base/debug/trace_event_impl.h

 // 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.
 
 
 #ifndef BASE_DEBUG_TRACE_EVENT_IMPL_H_
 #define BASE_DEBUG_TRACE_EVENT_IMPL_H_
 
 #include <stack>
 #include <string>
@@ skipping 445 matching lines @@
   // by the Singleton class.
   friend struct StaticMemorySingletonTraits<TraceLog>;
 
   // Enable/disable each category group based on the current category_filter_.
   // If the category group contains a category that matches an included category
   // pattern, that category group will be enabled.
   void EnableIncludedCategoryGroups();
   void EnableIncludedCategoryGroup(int category_index);
 
   static void SetCategoryGroupEnabled(int category_index, bool enabled);
+  static bool IsCategoryGroupEnabled(
+      const unsigned char* category_group_enabled);
 
   // The pointer returned from GetCategoryGroupEnabledInternal() points to a
   // value with zero or more of the following bits. Used in this class only.
   // The TRACE_EVENT macros should only use the value as a bool.
   enum CategoryEnabledFlags {
     // Normal enabled flag for categories enabled with Enable().
     CATEGORY_ENABLED = 1 << 0,
     // On Android if ATrace is enabled, all categories will have this bit.
     // Not used on other platforms.
     ATRACE_ENABLED = 1 << 1
@@ skipping 77 matching lines @@
 
   CategoryFilter category_filter_;
 
   DISALLOW_COPY_AND_ASSIGN(TraceLog);
 };
 
 }  // namespace debug
 }  // namespace base
 
 #endif  // BASE_DEBUG_TRACE_EVENT_IMPL_H_