DCHECK if shader compilation fails that it's due to context loss.

content/common/gpu/client/command_buffer_proxy_impl.cc

 // 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.
 
 #include "content/common/gpu/client/command_buffer_proxy_impl.h"
 
 #include <vector>
 
 #include "base/callback.h"
 #include "base/logging.h"
@@ skipping 428 matching lines @@
     DLOG(ERROR) << "GpuCommandBufferMsg_CreateStreamTexture returned failure";
     return 0;
   }
   return stream_id;
 }
 
 void CommandBufferProxyImpl::SetLock(base::Lock* lock) {
   lock_ = lock;
 }
 
+bool CommandBufferProxyImpl::IsGpuChannelLost() {
+  return channel_->IsLost();

[piman, 2015/06/08 22:21:16]

!channel_ || channel_->IsLost()

To my dismay we reset channel_ in some places (when lost).

[danakj, 2015/06/08 22:22:37]

Done.

+}
+
 uint32 CommandBufferProxyImpl::InsertSyncPoint() {
   CheckLock();
   if (last_state_.error != gpu::error::kNoError)
     return 0;
 
   uint32 sync_point = 0;
   Send(new GpuCommandBufferMsg_InsertSyncPoint(route_id_, true, &sync_point));
   return sync_point;
 }
 
@@ skipping 152 matching lines @@
   }
 }
 
 void CommandBufferProxyImpl::OnUpdateVSyncParameters(base::TimeTicks timebase,
                                                      base::TimeDelta interval) {
   if (!update_vsync_parameters_completion_callback_.is_null())
     update_vsync_parameters_completion_callback_.Run(timebase, interval);
 }
 
 }  // namespace content