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..b3fb671b1e28184b92e6bedeca5771596c33b095 100644
--- a/ui/gfx/gpu_memory_buffer.cc
+++ b/ui/gfx/gpu_memory_buffer.cc
@@ -4,6 +4,9 @@
 
 #include "ui/gfx/gpu_memory_buffer.h"
 
+#include "ui/gfx/generic_shared_memory_id.h"
+#include "ui/gfx/gpu_memory_buffer_tracing.h"
+
 namespace gfx {
 
 GpuMemoryBufferHandle::GpuMemoryBufferHandle()
@@ -48,4 +51,11 @@ GpuMemoryBufferHandle CloneHandleForIPC(
   return gfx::GpuMemoryBufferHandle();
 }
 
+base::trace_event::MemoryAllocatorDumpGuid
+GpuMemoryBufferHandle::GetGUIDForTracing(uint64_t tracing_process_id) {
+  if (type == gfx::SHARED_MEMORY_BUFFER)
+    return gfx::GetSharedMemoryGUIDForTracing(tracing_process_id, id);
+  return gfx::GetGenericSharedGpuMemoryGUIDForTracing(tracing_process_id, id);
+}
+
 }  // namespace gfx