Enable memory profiler when TC_MALLOC is enabled for

third_party/tcmalloc/chromium/src/gperftools/malloc_extension.h

-// Copyright (c) 2005, Google Inc.
+// Copyright (c) 2012, Google Inc.
 // All rights reserved.
 // 
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 // 
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 // copyright notice, this list of conditions and the following disclaimer
@@ skipping 288 matching lines @@
   };
   virtual Ownership GetOwnership(const void* p);
 
   // The current malloc implementation.  Always non-NULL.
   static MallocExtension* instance();
 
   // Change the malloc implementation.  Typically called by the
   // malloc implementation during initialization.
   static void Register(MallocExtension* implementation);
 
+  // On the current thread, return the total number of bytes allocated.
+  // (Currently only implemented in tcmalloc.)
+  static unsigned int GetBytesAllocatedOnCurrentThread();
+
   // Returns detailed information about malloc's freelists. For each list,
   // return a FreeListInfo:
   struct FreeListInfo {
     size_t min_object_size;
     size_t max_object_size;
     size_t total_bytes_free;
     const char* type;
   };
   // Each item in the vector refers to a different freelist. The lists
   // are identified by the range of allocations that objects in the
@@ skipping 71 matching lines @@
 
   // Perhaps add the following:
   // - stack trace if this range was sampled
   // - heap growth stack trace if applicable to this range
   // - age when allocated (for inuse) or freed (if not in use)
 };
 
 } // namespace base
 
 #endif  // BASE_MALLOC_EXTENSION_H_