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

gpu/command_buffer/client/gpu_control.h

Index: gpu/command_buffer/client/gpu_control.h
diff --git a/gpu/command_buffer/client/gpu_control.h b/gpu/command_buffer/client/gpu_control.h
index 2b303b3b4d58ced50269d00d2598e29c248dcf4d..75bd082a34da478b9247d294c050e2cb8c864fcb 100644
--- a/gpu/command_buffer/client/gpu_control.h
+++ b/gpu/command_buffer/client/gpu_control.h
@@ -85,6 +85,10 @@ class GPU_EXPORT GpuControl {
   // may not be supported with all implementations.
   virtual void SetLock(base::Lock*) = 0;
 
+  // Returns true if the channel to the Gpu is lost. When true, all contexts
+  // should be considered as lost.
+  virtual bool IsGpuChannelLost() = 0;
+
  private:
   DISALLOW_COPY_AND_ASSIGN(GpuControl);
 };