cc: Damage layer on delegated scroll

cc/trees/layer_tree_host_impl_unittest.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 <cmath>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 3444 matching lines @@
   DrawFrame();
   CheckLayerScrollDelta(scroll_layer, gfx::Vector2dF(0.f, 0.f));
   EXPECT_FALSE(host_impl_->active_tree()->needs_update_draw_properties());
 
   // Set external scroll delta on delegate and notify LayerTreeHost.
   gfx::ScrollOffset scroll_offset(10.f, 10.f);
   scroll_delegate.set_getter_return_value(scroll_offset);
   host_impl_->OnRootLayerDelegatedScrollOffsetChanged();
 
   // Check scroll delta reflected in layer.
-  DrawFrame();
+  LayerTreeHostImpl::FrameData frame;
+  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
+  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
+  host_impl_->DidDrawAllLayers(frame);
+  EXPECT_FALSE(frame.has_no_damage);
   CheckLayerScrollDelta(scroll_layer, ScrollOffsetToVector2dF(scroll_offset));
 
   host_impl_->SetRootLayerScrollOffsetDelegate(NULL);
 }
 
 TEST_F(LayerTreeHostImplTest, OverscrollRoot) {
   SetupScrollAndContentsLayers(gfx::Size(100, 100));
   host_impl_->SetViewportSize(gfx::Size(50, 50));
   host_impl_->active_tree()->SetPageScaleFactorAndLimits(1.f, 0.5f, 4.f);
   DrawFrame();
@@ skipping 3791 matching lines @@
   // surface.
   EXPECT_EQ(0, num_lost_surfaces_);
   host_impl_->DidLoseOutputSurface();
   EXPECT_EQ(1, num_lost_surfaces_);
   host_impl_->DidLoseOutputSurface();
   EXPECT_LE(1, num_lost_surfaces_);
 }
 
 }  // namespace
 }  // namespace cc