Mac: Add partial swap support to NSOpenGLContext path

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 71 matching lines @@
 
 IPC_STRUCT_BEGIN(GpuMsg_CreateGpuMemoryBuffer_Params)
   IPC_STRUCT_MEMBER(int32, id)
   IPC_STRUCT_MEMBER(gfx::Size, size)
   IPC_STRUCT_MEMBER(gfx::GpuMemoryBuffer::Format, format)
   IPC_STRUCT_MEMBER(gfx::GpuMemoryBuffer::Usage, usage)
   IPC_STRUCT_MEMBER(int32, client_id)
   IPC_STRUCT_MEMBER(gfx::PluginWindowHandle, surface_handle)
 IPC_STRUCT_END()
 
+#if defined(OS_MACOSX)
 IPC_STRUCT_BEGIN(GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params)
   IPC_STRUCT_MEMBER(int32, surface_id)
   IPC_STRUCT_MEMBER(uint64, surface_handle)
   IPC_STRUCT_MEMBER(int32, route_id)
   IPC_STRUCT_MEMBER(gfx::Size, size)
+  IPC_STRUCT_MEMBER(gfx::Rect, damage_rect)
   IPC_STRUCT_MEMBER(float, scale_factor)
   IPC_STRUCT_MEMBER(std::vector<ui::LatencyInfo>, latency_info)
 IPC_STRUCT_END()
 
-#if defined(OS_MACOSX)
 IPC_STRUCT_BEGIN(AcceleratedSurfaceMsg_BufferPresented_Params)
   // If the browser needs framerate throttling based on GPU back-pressure to be
   // disabled (e.g, because the NSView isn't visible but tab capture is active),
   // then this is set to true.
   IPC_STRUCT_MEMBER(bool, disable_throttling)
   // If the browser is drawing to the screen, this is the CGL renderer ID of
   // the GL context that the brower is using.
   IPC_STRUCT_MEMBER(int32, renderer_id)
 IPC_STRUCT_END()
 #endif
@@ skipping 274 matching lines @@
 IPC_MESSAGE_CONTROL3(GpuHostMsg_OnLogMessage,
                      int /*severity*/,
                      std::string /* header */,
                      std::string /* message */)
 
 // Tells the browser that a new accelerated surface was initialized.
 IPC_MESSAGE_CONTROL2(GpuHostMsg_AcceleratedSurfaceInitialized,
                      int32 /* surface_id */,
                      int32 /* route_id */)
 
-// Same as above with a rect of the part of the surface that changed.
+
+#if defined(OS_MACOSX)
+// Tells the browser that an accelerated surface has swapped.
 IPC_MESSAGE_CONTROL1(GpuHostMsg_AcceleratedSurfaceBuffersSwapped,
                      GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params)
+#endif
 
 IPC_MESSAGE_CONTROL1(GpuHostMsg_DidCreateOffscreenContext,
                      GURL /* url */)
 
 IPC_MESSAGE_CONTROL3(GpuHostMsg_DidLoseContext,
                      bool /* offscreen */,
                      gpu::error::ContextLostReason /* reason */,
                      GURL /* url */)
 
 IPC_MESSAGE_CONTROL1(GpuHostMsg_DidDestroyOffscreenContext,
@@ skipping 338 matching lines @@
                     int32 /* bitstream_buffer_id */,
                     uint32 /* payload_size */,
                     bool /* key_frame */)
 
 // Report error condition.
 IPC_MESSAGE_ROUTED1(AcceleratedVideoEncoderHostMsg_NotifyError,
                     media::VideoEncodeAccelerator::Error /* error */)
 
 // Send destroy request to the encoder.
 IPC_MESSAGE_ROUTED0(AcceleratedVideoEncoderMsg_Destroy)