[WIP] Add SharedMemoryTracker to dump base::SharedMemory usage

gpu/command_buffer/service/transfer_buffer_manager.cc

Index: gpu/command_buffer/service/transfer_buffer_manager.cc
diff --git a/gpu/command_buffer/service/transfer_buffer_manager.cc b/gpu/command_buffer/service/transfer_buffer_manager.cc
index 9f583b9f656cee8958219f7c84253323e3d1bbb2..5e7373468fc77dbbe1184550d8a7e059c011d7ea 100644
--- a/gpu/command_buffer/service/transfer_buffer_manager.cc
+++ b/gpu/command_buffer/service/transfer_buffer_manager.cc
@@ -10,6 +10,7 @@
 #include <memory>
 
 #include "base/logging.h"
+#include "base/memory/shared_memory_dump_provider.h"
 #include "base/process/process_handle.h"
 #include "base/strings/stringprintf.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ -121,6 +122,8 @@ bool TransferBufferManager::OnMemoryDump(
     dump->AddScalar(MemoryAllocatorDump::kNameSize,
                     MemoryAllocatorDump::kUnitsBytes,
                     shared_memory_bytes_allocated_);
+    base::SharedMemoryDumpProvider::GetInstance()->AddSuballocation(
+        pmd, dump->guid());
 
     // Early out, no need for more detail in a BACKGROUND dump.
     return true;