Reorganize GUIDs for GPU memory buffers

ui/gfx/gpu_memory_buffer.cc

Index: ui/gfx/gpu_memory_buffer.cc
diff --git a/ui/gfx/gpu_memory_buffer.cc b/ui/gfx/gpu_memory_buffer.cc
index a7655d48ab7c108fea991d60105aec8c79a06e24..bbf54de426e23c4a45b916f4083fa305fb7f8335 100644
--- a/ui/gfx/gpu_memory_buffer.cc
+++ b/ui/gfx/gpu_memory_buffer.cc
@@ -4,6 +4,8 @@
 
 #include "ui/gfx/gpu_memory_buffer.h"
 
+#include "ui/gfx/generic_shared_memory_id.h"
+
 namespace gfx {
 
 GpuMemoryBufferHandle::GpuMemoryBufferHandle()
@@ -48,4 +50,11 @@ GpuMemoryBufferHandle CloneHandleForIPC(
   return gfx::GpuMemoryBufferHandle();
 }
 
+base::trace_event::MemoryAllocatorDumpGuid GpuMemoryBuffer::GetGUIDForTracing(
+    uint64_t tracing_process_id) const {
+  auto handle = GetHandle();

[reveman, 2017/04/18 13:44:52]

nit: please use GetId() instead. The handle is meant for IPC only.

[hajimehoshi, 2017/04/19 06:15:12]

Done.

+  return gfx::GetGenericSharedGpuMemoryGUIDForTracing(tracing_process_id,
+                                                      handle.id);
+}
+
 }  // namespace gfx