Make lost context and error message callbacks on GpuControl go to client

gpu/gles2_conform_support/egl/display.cc

Index: gpu/gles2_conform_support/egl/display.cc
diff --git a/gpu/gles2_conform_support/egl/display.cc b/gpu/gles2_conform_support/egl/display.cc
index 0223a86fb1adb36494f49a713ada50c7aeacf890..a19718b4c35e8c5a0030314a4d2a6e6eeac3d857 100644
--- a/gpu/gles2_conform_support/egl/display.cc
+++ b/gpu/gles2_conform_support/egl/display.cc
@@ -322,6 +322,10 @@ bool Display::MakeCurrent(EGLSurface draw, EGLSurface read, EGLContext ctx) {
   return true;
 }
 
+void Display::SetGpuControlClient(gpu::GpuControlClient*) {
+  // The client is not currently called, so don't store it.
+}
+
 gpu::Capabilities Display::GetCapabilities() {
   return decoder_->GetCapabilities();
 }