Add a new command buffer function glScheduleCALayerInUseQueryCHROMIUM.

gpu/ipc/common/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 <stdint.h>
 
 #include <string>
@@ skipping 29 matching lines @@
 #elif defined(OS_MACOSX)
 #include "ui/base/cocoa/remote_layer_api.h"
 #include "ui/gfx/mac/io_surface.h"
 #endif
 
 #undef IPC_MESSAGE_EXPORT
 #define IPC_MESSAGE_EXPORT GPU_EXPORT
 
 #define IPC_MESSAGE_START GpuChannelMsgStart
 
+// Singly-included section for typedefs.
+#ifndef GPU_IPC_COMMON_GPU_MESSAGES_H_
+#define GPU_IPC_COMMON_GPU_MESSAGES_H_
+
+using SwapBuffersCompletedIOSurfaceInUseQuery = std::pair<uint32_t, bool>;

[piman, 2016/06/14 00:58:56]

nit: may I suggest an actual struct:

IPC_STRUCT_BEGIN(SwapBuffersCompletedIOSurfaceInUseQuery)
  IPC_STRUCT_MEMBER(uint32_t, texture)
  IPC_STRUCT_MEMBER(uint32_t, in_use)
IPC_STRUCT_END()


That way, the code that uses it can say ".texture" and ".in_use" instead of
".first" and ".second".

[erikchen, 2016/06/14 01:47:51]

good point. done.

+
+#endif  // GPU_IPC_COMMON_GPU_MESSAGES_H_
+
 IPC_STRUCT_BEGIN(GPUCommandBufferConsoleMessage)
   IPC_STRUCT_MEMBER(int32_t, id)
   IPC_STRUCT_MEMBER(std::string, message)
 IPC_STRUCT_END()
 
 IPC_STRUCT_BEGIN(GPUCreateCommandBufferConfig)
   IPC_STRUCT_MEMBER(gpu::SurfaceHandle, surface_handle)
   IPC_STRUCT_MEMBER(gfx::Size, size)
   IPC_STRUCT_MEMBER(int32_t, share_group_id)
   IPC_STRUCT_MEMBER(int32_t, stream_id)
@@ skipping 19 matching lines @@
   // the browser process.
   // https://crbug.com/604052
   IPC_STRUCT_MEMBER(gpu::SurfaceHandle, surface_handle)
   // Only one of ca_context_id or io_surface may be non-0.
   IPC_STRUCT_MEMBER(CAContextID, ca_context_id)
   IPC_STRUCT_MEMBER(bool, fullscreen_low_power_ca_context_valid)
   IPC_STRUCT_MEMBER(CAContextID, fullscreen_low_power_ca_context_id)
   IPC_STRUCT_MEMBER(gfx::ScopedRefCountedIOSurfaceMachPort, io_surface)
   IPC_STRUCT_MEMBER(gfx::Size, pixel_size)
   IPC_STRUCT_MEMBER(float, scale_factor)
+  IPC_STRUCT_MEMBER(std::vector<SwapBuffersCompletedIOSurfaceInUseQuery>,
+                    in_use_queries)
 #endif
   IPC_STRUCT_MEMBER(std::vector<ui::LatencyInfo>, latency_info)
   IPC_STRUCT_MEMBER(gfx::SwapResult, result)
 IPC_STRUCT_END()
 
 //------------------------------------------------------------------------------
 // GPU Channel Messages
 // These are messages from a renderer process to the GPU process.
 
 // Tells the GPU process to create a new command buffer. A corresponding
@@ skipping 141 matching lines @@
                     GpuCommandBufferMsg_CreateImage_Params /* params */)
 
 // Destroy a previously created image.
 IPC_MESSAGE_ROUTED1(GpuCommandBufferMsg_DestroyImage, int32_t /* id */)
 
 // Attaches an external image stream to the client texture.
 IPC_SYNC_MESSAGE_ROUTED2_1(GpuCommandBufferMsg_CreateStreamTexture,
                            uint32_t, /* client_texture_id */
                            int32_t,  /* stream_id */
                            bool /* succeeded */)