Devtools/CC: Remove continuous repainting feature

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 1b72a046aac4cc549afc5cb4fec953a8a5aa30a3..1fe7837daf01805e2d0e19e8c6f302363eedb354 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -1951,16 +1951,6 @@ void LayerTreeHostImpl::ActivateSyncTree() {
   if (!tree_activation_callback_.is_null())
     tree_activation_callback_.Run();
 
-  if (debug_state_.continuous_painting) {
-    const RenderingStats& stats =
-        rendering_stats_instrumentation_->GetRenderingStats();
-    // TODO(hendrikw): This requires a different metric when we commit directly
-    // to the active tree.  See crbug.com/429311.
-    paint_time_counter_->SavePaintTime(
-        stats.commit_to_activate_duration.GetLastTimeDelta() +
-        stats.draw_duration.GetLastTimeDelta());
-  }
-
   scoped_ptr<PendingPageScaleAnimation> pending_page_scale_animation =
       active_tree_->TakePendingPageScaleAnimation();
   if (pending_page_scale_animation) {
@@ -3311,8 +3301,6 @@ void LayerTreeHostImpl::SetDebugState(
     const LayerTreeDebugState& new_debug_state) {
   if (LayerTreeDebugState::Equal(debug_state_, new_debug_state))
     return;
-  if (debug_state_.continuous_painting != new_debug_state.continuous_painting)
-    paint_time_counter_->ClearHistory();
 
   debug_state_ = new_debug_state;
   UpdateTileManagerMemoryPolicy(ActualManagedMemoryPolicy());