cc: Remove FinishAllRendering, as it doesn't do anything anymore.

cc/trees/layer_tree_host_impl.cc

Index: cc/trees/layer_tree_host_impl.cc
diff --git a/cc/trees/layer_tree_host_impl.cc b/cc/trees/layer_tree_host_impl.cc
index 149b7e291c4f2bdbecc3ff735f4f93a5129ed498..d0f1d719830cc4b253374838626b19c1843c973b 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -1697,11 +1697,6 @@ void LayerTreeHostImpl::DidDrawAllLayers(const FrameData& frame) {
     it->DidDrawFrame();
 }
 
-void LayerTreeHostImpl::FinishAllRendering() {
-  if (renderer_)
-    renderer_->Finish();
-}
-
 int LayerTreeHostImpl::RequestedMSAASampleCount() const {
   if (settings_.gpu_rasterization_msaa_sample_count == -1) {
     // Use the most up-to-date version of device_scale_factor that we have.