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

gpu/command_buffer/client/gles2_trace_implementation.cc

 // Copyright (c) 2013 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 "gpu/command_buffer/client/gles2_trace_implementation.h"
 #include "gpu/command_buffer/common/trace_event.h"
 
 namespace gpu {
 namespace gles2 {
 
 GLES2TraceImplementation::GLES2TraceImplementation(GLES2Interface* gl)
     : gl_(gl) {
 }
 
 GLES2TraceImplementation::~GLES2TraceImplementation() {
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "gpu/command_buffer/client/gles2_trace_implementation_impl_autogen.h"
 
+GLboolean GLES2TraceImplementation::IsContextLost() {
+  TRACE_EVENT_BINARY_EFFICIENT0("gpu", "GLES2Trace::IsContextLost");
+  return gl_->IsContextLost();
+}
+
 }  // namespace gles2
 }  // namespace gpu