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

cc/resources/resource_provider.cc

 // Copyright 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 "cc/resources/resource_provider.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
 #include <limits>
 #include <unordered_map>
 
 #include "base/atomic_sequence_num.h"
 #include "base/macros.h"
+#include "base/memory/shared_memory_tracker.h"
 #include "base/metrics/histogram.h"
 #include "base/numerics/safe_math.h"
 #include "base/stl_util.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/trace_event/memory_dump_manager.h"
 #include "base/trace_event/trace_event.h"
 #include "cc/resources/platform_color.h"
@@ skipping 2094 matching lines @@
 
     uint64_t total_bytes = ResourceUtil::UncheckedSizeInBytesAligned<size_t>(
         resource.size, resource.format);
     dump->AddScalar(base::trace_event::MemoryAllocatorDump::kNameSize,
                     base::trace_event::MemoryAllocatorDump::kUnitsBytes,
                     static_cast<uint64_t>(total_bytes));
 
     // Resources may be shared across processes and require a shared GUID to
     // prevent double counting the memory.
     base::trace_event::MemoryAllocatorDumpGuid guid;
+    base::SharedMemoryHandle shared_memory_handle;
     switch (resource.type) {
       case RESOURCE_TYPE_GPU_MEMORY_BUFFER:
         guid = gfx::GetGpuMemoryBufferGUIDForTracing(
             tracing_process_id, resource.gpu_memory_buffer->GetHandle().id);
+        shared_memory_handle = resource.gpu_memory_buffer->GetHandle().handle;
         break;
       case RESOURCE_TYPE_GL_TEXTURE:
         DCHECK(resource.gl_id);
         guid = gl::GetGLTextureClientGUIDForTracing(
             compositor_context_provider_->ContextSupport()
                 ->ShareGroupTracingGUID(),
             resource.gl_id);
         break;
       case RESOURCE_TYPE_BITMAP:
         DCHECK(resource.has_shared_bitmap_id);
         guid = GetSharedBitmapGUIDForTracing(resource.shared_bitmap_id);
+        auto shared_memory = resource.shared_bitmap->shared_memory();
+        if (shared_memory)
+          shared_memory_handle = shared_memory->handle();
         break;
     }
 
     DCHECK(!guid.empty());
 
     const int kImportance = 2;
     pmd->CreateSharedGlobalAllocatorDump(guid);
     pmd->AddOwnershipEdge(dump->guid(), guid, kImportance);
+    if (shared_memory_handle != base::SharedMemory::NULLHandle()) {
+      base::SharedMemoryTracker::AddOwnershipEdgeToSharedGlobalDump(
+          pmd, guid, shared_memory_handle, total_bytes);
+    }
   }
 
   return true;
 }
 
 }  // namespace cc