Aura: Resize locks with --ui-enable-threaded-compositing

content/common/gpu/gpu_messages.h

 // Copyright (c) 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.
 
 // Multiply-included message file, hence no include guard here, but see below
 // for a much smaller-than-usual include guard section.
 
 #include <string>
 #include <vector>
 
@@ skipping 215 matching lines @@
 IPC_MESSAGE_ROUTED0(AcceleratedSurfaceMsg_ResizeViewACK)
 
 // Tells the GPU process if it's worth suggesting release of the front surface.
 IPC_MESSAGE_ROUTED2(AcceleratedSurfaceMsg_SetFrontSurfaceIsProtected,
                     bool /* is_protected */,
                     uint32 /* protection_state_id */)
 
 // Tells the GPU process that the browser process has handled the swap
 // buffers or post sub-buffer request. A non-zero sync point means
 // that we should wait for the sync point.
+//
+// |#if defined(USE_AURA)|, a zero sync point means the new buffer
+// will not be presented and can be reused.

[piman, 2012/07/31 23:42:17]

Could we make this explicit instead? Linking both independent concepts may cause
trouble in the future.

[jonathan.backer, 2012/08/01 17:22:43]

Done.

 IPC_MESSAGE_ROUTED1(AcceleratedSurfaceMsg_BufferPresented,
                     uint32 /* sync_point */)
 
 // Tells the GPU process to remove all contexts.
 IPC_MESSAGE_CONTROL0(GpuMsg_Clean)
 
 // Tells the GPU process to crash.
 IPC_MESSAGE_CONTROL0(GpuMsg_Crash)
 
 // Tells the GPU process to hang.
@@ skipping 342 matching lines @@
 
 // Confirm decoder has been flushed.
 IPC_MESSAGE_ROUTED0(AcceleratedVideoDecoderHostMsg_FlushDone)
 
 // Confirm decoder has been reset.
 IPC_MESSAGE_ROUTED0(AcceleratedVideoDecoderHostMsg_ResetDone)
 
 // Video decoder has encountered an error.
 IPC_MESSAGE_ROUTED1(AcceleratedVideoDecoderHostMsg_ErrorNotification,
                     uint32) /* Error ID */