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..e8eb7d2d52122d81ea92e9e72b364176b012e367 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 +50,10 @@ GpuMemoryBufferHandle CloneHandleForIPC(
   return gfx::GpuMemoryBufferHandle();
 }
 
+base::trace_event::MemoryAllocatorDumpGuid GpuMemoryBuffer::GetGUIDForTracing(
+    uint64_t tracing_process_id) const {
+  return gfx::GetGenericSharedGpuMemoryGUIDForTracing(tracing_process_id,
+                                                      GetId());
+}
+
 }  // namespace gfx