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

gpu/command_buffer/service/transfer_buffer_manager.cc

 // Copyright (c) 2012 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.
 
 #include "gpu/command_buffer/service/transfer_buffer_manager.h"
 
 #include <stdint.h>
 
 #include <limits>
 #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"
 #include "base/trace_event/memory_allocator_dump.h"
 #include "base/trace_event/memory_dump_manager.h"
 #include "base/trace_event/process_memory_dump.h"
 #include "base/trace_event/trace_event.h"
 #include "gpu/command_buffer/common/cmd_buffer_common.h"
 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
 #include "gpu/command_buffer/service/memory_tracking.h"
@@ skipping 91 matching lines @@
   using base::trace_event::MemoryAllocatorDump;
   using base::trace_event::MemoryDumpLevelOfDetail;
 
   if (args.level_of_detail == MemoryDumpLevelOfDetail::BACKGROUND) {
     std::string dump_name = base::StringPrintf("gpu/transfer_memory/client_%d",
                                                memory_tracker_->ClientId());
     MemoryAllocatorDump* dump = pmd->CreateAllocatorDump(dump_name);
     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;
   }
 
   for (const auto& buffer_entry : registered_buffers_) {
     int32_t buffer_id = buffer_entry.first;
     const Buffer* buffer = buffer_entry.second.get();
     std::string dump_name =
         base::StringPrintf("gpu/transfer_memory/client_%d/buffer_%d",
                            memory_tracker_->ClientId(), buffer_id);
     MemoryAllocatorDump* dump = pmd->CreateAllocatorDump(dump_name);
     dump->AddScalar(MemoryAllocatorDump::kNameSize,
                     MemoryAllocatorDump::kUnitsBytes, buffer->size());
     auto guid =
         GetBufferGUIDForTracing(memory_tracker_->ClientTracingId(), buffer_id);
     pmd->CreateSharedGlobalAllocatorDump(guid);
     pmd->AddOwnershipEdge(dump->guid(), guid);
   }
 
   return true;
 }
 
 }  // namespace gpu