Add a command to lose the context

gpu/command_buffer/client/gles2_implementation_impl_autogen.h

Index: gpu/command_buffer/client/gles2_implementation_impl_autogen.h
diff --git a/gpu/command_buffer/client/gles2_implementation_impl_autogen.h b/gpu/command_buffer/client/gles2_implementation_impl_autogen.h
index fdedf437a7e4cd6499beca1a069ed0e6ef92c3d4..9264680c22e96b78314b35b410e66d6c63730e10 100644
--- a/gpu/command_buffer/client/gles2_implementation_impl_autogen.h
+++ b/gpu/command_buffer/client/gles2_implementation_impl_autogen.h
@@ -1693,6 +1693,14 @@ void GLES2Implementation::DiscardFramebufferEXT(
     return;
   }
   helper_->DiscardFramebufferEXTImmediate(target, count, attachments);
+  CheckGLError();
+}
+
+void GLES2Implementation::LoseContextCHROMIUM() {
+  GPU_CLIENT_SINGLE_THREAD_CHECK();
+  GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glLoseContextCHROMIUM(" << ")");
+  helper_->LoseContextCHROMIUM();
+  CheckGLError();
 }
 
 #endif  // GPU_COMMAND_BUFFER_CLIENT_GLES2_IMPLEMENTATION_IMPL_AUTOGEN_H_