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 fa3ba0e599df1d93f2bbd0fdf3c7ce6f33c2a9cd..fb9601d1cf77b566d3faac883ab13145a4d2db07 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -29,7 +29,6 @@
 #include "cc/debug/devtools_instrumentation.h"
 #include "cc/debug/frame_rate_counter.h"
 #include "cc/debug/frame_viewer_instrumentation.h"
-#include "cc/debug/paint_time_counter.h"
 #include "cc/debug/rendering_stats_instrumentation.h"
 #include "cc/debug/traced_value.h"
 #include "cc/input/page_scale_animation.h"
@@ -204,7 +203,6 @@ LayerTreeHostImpl::LayerTreeHostImpl(
       pinch_gesture_active_(false),
       pinch_gesture_end_should_clear_scrolling_layer_(false),
       fps_counter_(FrameRateCounter::Create(proxy_->HasImplThread())),
-      paint_time_counter_(PaintTimeCounter::Create()),
       memory_history_(MemoryHistory::Create()),
       debug_rect_history_(DebugRectHistory::Create()),
       texture_mailbox_deleter_(new TextureMailboxDeleter(GetTaskRunner())),
@@ -1918,16 +1916,6 @@ 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) {
@@ -3279,8 +3267,6 @@ 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());