[tracing] Add SkResourceCache as suballocation to avoid double counting.

content/common/discardable_shared_memory_heap.h

 // 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.
 
 #ifndef CONTENT_COMMON_DISCARDABLE_SHARED_MEMORY_HEAP_H_
 #define CONTENT_COMMON_DISCARDABLE_SHARED_MEMORY_HEAP_H_
 
 #include "base/callback.h"
 #include "base/containers/hash_tables.h"
 #include "base/containers/linked_list.h"
@@ skipping 70 matching lines @@
 
   // Returns total bytes of memory in heap.
   size_t GetSize() const;
 
   // Returns bytes of memory currently in the free lists.
   size_t GetSizeOfFreeLists() const;
 
   // Dumps memory statistics for chrome://tracing.
   bool OnMemoryDump(base::trace_event::ProcessMemoryDump* pmd);
 
+  // Creates a common dump for all the sub-allocated objects from discardable
+  // memory.
+  static void CreateAllocatedObjectsDump(
+      base::trace_event::ProcessMemoryDump* pmd);
+
   // Returns a unique identifier for a given tuple of (process id, segment id)
   // that can be used to match memory dumps across different processes.
   static base::trace_event::MemoryAllocatorDumpGuid GetSegmentGUIDForTracing(
       uint64 tracing_process_id,
       int32 segment_id);
 
  private:
   class ScopedMemorySegment {
    public:
     ScopedMemorySegment(DiscardableSharedMemoryHeap* heap,
@@ skipping 52 matching lines @@
   // is a free list of runs that consist of k blocks. The 256th entry is a
   // free list of runs that have length >= 256 blocks.
   base::LinkedList<Span> free_spans_[256];
 
   DISALLOW_COPY_AND_ASSIGN(DiscardableSharedMemoryHeap);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_DISCARDABLE_SHARED_MEMORY_HEAP_H_