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

chrome/gpu/gpu_channel.cc

 // Copyright (c) 2010 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.
 
 #include "chrome/gpu/gpu_channel.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
@@ skipping 61 matching lines @@
 }
 
 #if defined(OS_MACOSX)
 void GpuChannel::AcceleratedSurfaceBuffersSwapped(
     int32 route_id, uint64 swap_buffers_count) {
   GpuCommandBufferStub* stub = stubs_.Lookup(route_id);
   if (stub == NULL)
     return;
   stub->AcceleratedSurfaceBuffersSwapped(swap_buffers_count);
 }
+
+void GpuChannel::DidDestroySurface(int32 renderer_route_id) {
+  // Since acclerated views are created in the renderer process and then sent
+  // to the browser process during GPU channel construction, it is possible that
+  // this is called before a GpuCommandBufferStub for |renderer_route_id| was
+  // put into |stubs_|. Hence, do not walk |stubs_| here but instead remember
+  // all |renderer_route_id|s this was called for and use them later.
+  destroyed_renderer_routes_.insert(renderer_route_id);
+}
+
+bool GpuChannel::IsRenderViewGone(int32 renderer_route_id) {
+  return destroyed_renderer_routes_.count(renderer_route_id) > 0;
+}
 #endif
 
 void GpuChannel::OnControlMessageReceived(const IPC::Message& msg) {
   IPC_BEGIN_MESSAGE_MAP(GpuChannel, msg)
     IPC_MESSAGE_HANDLER(GpuChannelMsg_CreateViewCommandBuffer,
         OnCreateViewCommandBuffer)
     IPC_MESSAGE_HANDLER(GpuChannelMsg_CreateOffscreenCommandBuffer,
         OnCreateOffscreenCommandBuffer)
     IPC_MESSAGE_HANDLER(GpuChannelMsg_DestroyCommandBuffer,
         OnDestroyCommandBuffer)
@@ skipping 153 matching lines @@
 #if defined(OS_POSIX)
 int GpuChannel::GetRendererFileDescriptor() {
   int fd = -1;
   if (channel_.get()) {
     fd = channel_->GetClientFileDescriptor();
   }
   return fd;
 }
 #endif  // defined(OS_POSIX)