[tracing] Add graphics memory dump provider for Android

base/trace_event/process_memory_dump.h

Index: base/trace_event/process_memory_dump.h
diff --git a/base/trace_event/process_memory_dump.h b/base/trace_event/process_memory_dump.h
index da18a14b1ca1d2909224011fcb5bc89d0286b69e..7a16aa4a4af0389697e2a7908f66b77043f6c653 100644
--- a/base/trace_event/process_memory_dump.h
+++ b/base/trace_event/process_memory_dump.h
@@ -64,6 +64,9 @@ class BASE_EXPORT ProcessMemoryDump {
   // 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.