Revert of Correctly handle damage involving filters in SurfaceAggregator

cc/trees/layer_tree_host_impl.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/trees/layer_tree_host_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 801 matching lines @@
     RenderSurfaceImpl* render_surface = render_surface_layer->render_surface();
 
     bool should_draw_into_render_pass =
         active_tree_->IsRootLayer(render_surface_layer) ||
         render_surface->contributes_to_drawn_surface() ||
         render_surface_layer->HasCopyRequest();
     if (should_draw_into_render_pass)
       render_surface->AppendRenderPasses(frame);
   }
 
-  // Damage rects for non-root passes aren't meaningful, so set them to be
-  // equal to the output rect.
-  for (size_t i = 0; i + 1 < frame->render_passes.size(); ++i) {
-    RenderPass* pass = frame->render_passes[i].get();
-    pass->damage_rect = pass->output_rect;
-  }
-
   // When we are displaying the HUD, change the root damage rect to cover the
   // entire root surface. This will disable partial-swap/scissor optimizations
   // that would prevent the HUD from updating, since the HUD does not cause
   // damage itself, to prevent it from messing with damage visualizations. Since
   // damage visualizations are done off the LayerImpls and RenderSurfaceImpls,
   // changing the RenderPass does not affect them.
   if (active_tree_->hud_layer()) {
     RenderPass* root_pass = frame->render_passes.back().get();
     root_pass->damage_rect = root_pass->output_rect;
   }
@@ skipping 3123 matching lines @@
   return task_runner_provider_->HasImplThread();
 }
 
 bool LayerTreeHostImpl::CommitToActiveTree() const {
   // In single threaded mode we skip the pending tree and commit directly to the
   // active tree.
   return !task_runner_provider_->HasImplThread();
 }
 
 }  // namespace cc