Mac: Don't hang gpu process on popup close under certain conditions

chrome/common/gpu_messages_internal.h

Index: chrome/common/gpu_messages_internal.h
diff --git a/chrome/common/gpu_messages_internal.h b/chrome/common/gpu_messages_internal.h
index 38147026634047b7fef6c6a166725d5fa95ccf98..43e5fcb28f41c6e0e1e286c09ece7be35d195d5a 100644
--- a/chrome/common/gpu_messages_internal.h
+++ b/chrome/common/gpu_messages_internal.h
@@ -59,6 +59,13 @@ IPC_MESSAGE_CONTROL3(GpuMsg_AcceleratedSurfaceBuffersSwappedACK,
                      int /* renderer_id */,
                      int32 /* route_id */,
                      uint64 /* swap_buffers_count */)
+
+// Tells the GPU process that the IOSurface of the buffer belonging to
+// |renderer_route_id| a given id was destroyed, either by the user closing the
+// tab hosting the surface, or by the renderer navigating to a new page.
+IPC_MESSAGE_CONTROL2(GpuMsg_DidDestroySurface,

[Ken Russell (switch to Gerrit), 2010/12/22 23:16:44]

You might want to call this DidDestroyAcceleratedSurface to match the other
similar message names; this is not a big deal however.

+                     int /* renderer_id */,
+                     int32 /* renderer_route_id */)
 #endif
 
 // Tells the GPU process to crash.