[tracing] Add graphics memory dump provider for Android

base/trace_event/process_memory_dump.h

 // Copyright 2015 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_TRACE_EVENT_PROCESS_MEMORY_DUMP_H_
 #define BASE_TRACE_EVENT_PROCESS_MEMORY_DUMP_H_
 
 #include <vector>
 
 #include "base/base_export.h"
@@ skipping 46 matching lines @@
   //       it will be automatically generated.
   // ProcessMemoryDump handles the memory ownership of its MemoryAllocatorDumps.
   MemoryAllocatorDump* CreateAllocatorDump(const std::string& absolute_name);
   MemoryAllocatorDump* CreateAllocatorDump(const std::string& absolute_name,
                                            const MemoryAllocatorDumpGuid& guid);
 
   // Looks up a MemoryAllocatorDump given its allocator and heap names, or
   // nullptr if not found.
   MemoryAllocatorDump* GetAllocatorDump(const std::string& absolute_name) const;
 
+  MemoryAllocatorDump* GetOrCreateAllocatorDump(

[ericrk, 2015/10/02 18:30:11]

Can we remove the similar function from SkTraceMemoryDump_chrome.h? As a
separate CL is fine

[Primiano Tucci (use gerrit), 2015/10/05 14:24:25]

OK I'll do that in a separate CL (at this point before this, so this becomes
smaller)

+      const std::string& absolute_name);
+
   // Creates a shared MemoryAllocatorDump, to express cross-process sharing.
   // Shared allocator dumps are allowed to have duplicate guids within the
   // global scope, in order to reference the same dump from multiple processes.
   // See the design doc goo.gl/keU6Bf for reference usage patterns.
   MemoryAllocatorDump* CreateSharedGlobalAllocatorDump(
       const MemoryAllocatorDumpGuid& guid);
 
   // Looks up a shared MemoryAllocatorDump given its guid.
   MemoryAllocatorDump* GetSharedGlobalAllocatorDump(
       const MemoryAllocatorDumpGuid& guid) const;
@@ skipping 71 matching lines @@
   // Keeps track of relationships between MemoryAllocatorDump(s).
   std::vector<MemoryAllocatorDumpEdge> allocator_dumps_edges_;
 
   DISALLOW_COPY_AND_ASSIGN(ProcessMemoryDump);
 };
 
 }  // namespace trace_event
 }  // namespace base
 
 #endif  // BASE_TRACE_EVENT_PROCESS_MEMORY_DUMP_H_