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

gpu/command_buffer/client/gles2_trace_implementation.cc

Index: gpu/command_buffer/client/gles2_trace_implementation.cc
diff --git a/gpu/command_buffer/client/gles2_trace_implementation.cc b/gpu/command_buffer/client/gles2_trace_implementation.cc
index 234f2432ac42490c503ae2ed792a61886749f19f..8725cd7d0cf26e33262ba6ab76ea00572cafda65 100644
--- a/gpu/command_buffer/client/gles2_trace_implementation.cc
+++ b/gpu/command_buffer/client/gles2_trace_implementation.cc
@@ -20,6 +20,11 @@ GLES2TraceImplementation::~GLES2TraceImplementation() {
 // 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