Remove runtime toggling of throttling frames

cc/test/proxy_impl_for_test.cc

Index: cc/test/proxy_impl_for_test.cc
diff --git a/cc/test/proxy_impl_for_test.cc b/cc/test/proxy_impl_for_test.cc
index 457bb32a6119b83e0bd105da8da3b591b56cdd0a..da0848ba3bb5e4fa1ae9749f83cf5d51bec7a206 100644
--- a/cc/test/proxy_impl_for_test.cc
+++ b/cc/test/proxy_impl_for_test.cc
@@ -79,11 +79,6 @@ void ProxyImplForTest::DidActivateSyncTree() {
   test_hooks_->DidActivateSyncTree();
 }
 
-void ProxyImplForTest::SetThrottleFrameProductionOnImpl(bool throttle) {
-  test_hooks_->SetThrottleFrameProductionOnImpl(throttle);
-  ProxyImpl::SetThrottleFrameProductionOnImpl(throttle);
-}
-
 void ProxyImplForTest::InitializeOutputSurfaceOnImpl(
     OutputSurface* output_surface) {
   test_hooks_->InitializeOutputSurfaceOnImpl(output_surface);