Associate an id with the output surface to handle lost contexts

content/common/view_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.
 
 // IPC messages for page rendering.
 // Multiply-included message file, hence no include guard.
 
 #include "base/process.h"
 #include "base/shared_memory.h"
 #include "base/strings/string16.h"
@@ skipping 1303 matching lines @@
 IPC_MESSAGE_ROUTED2(ViewMsg_PluginImeCompositionCompleted,
                     string16 /* text */,
                     int /* plugin_id */)
 
 // External popup menus.
 IPC_MESSAGE_ROUTED1(ViewMsg_SelectPopupMenuItem,
                     int /* selected index, -1 means no selection */)
 #endif
 
 // Sent by the browser as a reply to ViewHostMsg_SwapCompositorFrame.
-IPC_MESSAGE_ROUTED1(ViewMsg_SwapCompositorFrameAck,
+IPC_MESSAGE_ROUTED2(ViewMsg_SwapCompositorFrameAck,
+                    uint32 /* output_surface_id */,
                     cc::CompositorFrameAck /* ack */)
 
 // Sent by the browser to ask the renderer for a snapshot of the current view.
 IPC_MESSAGE_ROUTED1(ViewMsg_Snapshot,
                     gfx::Rect /* src_subrect */)
 
 // -----------------------------------------------------------------------------
 // Messages sent from the renderer to the browser.
 
 // Sent by the renderer when it is creating a new window.  The browser creates
@@ skipping 710 matching lines @@
   IPC_STRUCT_MEMBER(ui::LatencyInfo, latency_info)
 IPC_STRUCT_END()
 
 // This message is synthesized by GpuProcessHost to pass through a swap message
 // to the RenderWidgetHelper. This allows GetBackingStore to block for either a
 // software or GPU frame.
 IPC_MESSAGE_ROUTED1(
     ViewHostMsg_CompositorSurfaceBuffersSwapped,
     ViewHostMsg_CompositorSurfaceBuffersSwapped_Params /* params */)
 
-IPC_MESSAGE_ROUTED1(ViewHostMsg_SwapCompositorFrame,
+IPC_MESSAGE_ROUTED2(ViewHostMsg_SwapCompositorFrame,
+                    uint32 /* output_surface_id */,
                     cc::CompositorFrame /* frame */)
 
 // Sent by the compositor when input scroll events are dropped due to bounds
 // restricions on the root scroll offset.
 IPC_MESSAGE_ROUTED2(ViewHostMsg_DidOverscroll,
                     gfx::Vector2dF /* accumulated_overscroll */,
                     gfx::Vector2dF /* current_fling_velocity */)
 
 // Opens a file asynchronously. The response returns a file descriptor
 // and an error code from base/platform_file.h.
@@ skipping 268 matching lines @@
 // synchronously (see crbug.com/120597). This IPC message sends the character
 // bounds after every composition change to always have correct bound info.
 IPC_MESSAGE_ROUTED2(ViewHostMsg_ImeCompositionRangeChanged,
                     ui::Range /* composition range */,
                     std::vector<gfx::Rect> /* character bounds */)
 #endif
 
 // Adding a new message? Stick to the sort order above: first platform
 // independent ViewMsg, then ifdefs for platform specific ViewMsg, then platform
 // independent ViewHostMsg, then ifdefs for platform specific ViewHostMsg.