Fix UpdateTilePriorities viewport in Android WebView.

cc/trees/layer_tree_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_impl.h"
 
 #include "base/debug/trace_event.h"
 #include "cc/animation/keyframed_animation_curve.h"
 #include "cc/animation/scrollbar_animation_controller.h"
 #include "cc/debug/traced_value.h"
@@ skipping 189 matching lines @@
       pending_tree->SetPageScaleDelta(
           page_scale_delta_ / sent_page_scale_delta_);
     }
   }
 
   UpdateMaxScrollOffset();
   set_needs_update_draw_properties();
 }
 
 gfx::SizeF LayerTreeImpl::ScrollableViewportSize() const {
-  return gfx::ScaleSize(layer_tree_host_impl_->VisibleViewportSize(),
+  return gfx::ScaleSize(layer_tree_host_impl_->UnscaledScrollableViewportSize(),
                         1.0f / total_page_scale_factor());
 }
 
 void LayerTreeImpl::UpdateMaxScrollOffset() {
   LayerImpl* root_scroll = RootScrollLayer();
   if (!root_scroll || !root_scroll->children().size())
     return;
 
   gfx::Vector2dF max_scroll = gfx::Rect(ScrollableSize()).bottom_right() -
       gfx::RectF(ScrollableViewportSize()).bottom_right();
@@ skipping 44 matching lines @@
 
   LayerImpl* root_scroll = RootScrollLayer();
   DCHECK(root_scroll);
   DCHECK(IsActiveTree());
 
   gfx::RectF scrollable_viewport(
       gfx::PointAtOffsetFromOrigin(root_scroll->TotalScrollOffset()),
       ScrollableViewportSize());
   float vertical_adjust = 0.0f;
   if (RootContainerLayer())
-    vertical_adjust = layer_tree_host_impl_->VisibleViewportSize().height() -
-                      RootContainerLayer()->bounds().height();
+    vertical_adjust =
+        layer_tree_host_impl_->UnscaledScrollableViewportSize().height() -
+        RootContainerLayer()->bounds().height();
   if (ScrollbarLayerImplBase* horiz =
           root_scroll->horizontal_scrollbar_layer()) {
     horiz->SetVerticalAdjust(vertical_adjust);
     horiz->SetVisibleToTotalLengthRatio(
         scrollable_viewport.width() / ScrollableSize().width());
   }
   if (ScrollbarLayerImplBase* vertical =
           root_scroll->vertical_scrollbar_layer()) {
     vertical->SetVerticalAdjust(vertical_adjust);
     vertical->SetVisibleToTotalLengthRatio(
@@ skipping 160 matching lines @@
 }
 
 PaintTimeCounter* LayerTreeImpl::paint_time_counter() const {
   return layer_tree_host_impl_->paint_time_counter();
 }
 
 MemoryHistory* LayerTreeImpl::memory_history() const {
   return layer_tree_host_impl_->memory_history();
 }
 
+bool LayerTreeImpl::device_viewport_valid_for_tile_management() const {
+  return layer_tree_host_impl_->device_viewport_valid_for_tile_management();
+}
+
 bool LayerTreeImpl::IsActiveTree() const {
   return layer_tree_host_impl_->active_tree() == this;
 }
 
 bool LayerTreeImpl::IsPendingTree() const {
   return layer_tree_host_impl_->pending_tree() == this;
 }
 
 bool LayerTreeImpl::IsRecycleTree() const {
   return layer_tree_host_impl_->recycle_tree() == this;
@@ skipping 30 matching lines @@
 }
 
 base::TimeTicks LayerTreeImpl::CurrentPhysicalTimeTicks() const {
   return layer_tree_host_impl_->CurrentPhysicalTimeTicks();
 }
 
 void LayerTreeImpl::SetNeedsCommit() {
   layer_tree_host_impl_->SetNeedsCommit();
 }
 
+gfx::Rect LayerTreeImpl::DeviceViewport() const {
+  return layer_tree_host_impl_->DeviceViewport();
+}
+
 void LayerTreeImpl::SetNeedsRedraw() {
   layer_tree_host_impl_->SetNeedsRedraw();
 }
 
 const LayerTreeDebugState& LayerTreeImpl::debug_state() const {
   return layer_tree_host_impl_->debug_state();
 }
 
 float LayerTreeImpl::device_scale_factor() const {
   return layer_tree_host_impl_->device_scale_factor();
 }
 
-gfx::Size LayerTreeImpl::device_viewport_size() const {
-  return layer_tree_host_impl_->device_viewport_size();
-}
-
 DebugRectHistory* LayerTreeImpl::debug_rect_history() const {
   return layer_tree_host_impl_->debug_rect_history();
 }
 
 AnimationRegistrar* LayerTreeImpl::animationRegistrar() const {
   return layer_tree_host_impl_->animation_registrar();
 }
 
 scoped_ptr<base::Value> LayerTreeImpl::AsValue() const {
   scoped_ptr<base::DictionaryValue> state(new base::DictionaryValue());
@@ skipping 120 matching lines @@
 const std::vector<LayerImpl*> LayerTreeImpl::LayersWithCopyOutputRequest()
     const {
   // Only the active tree needs to know about layers with copy requests, as
   // they are aborted if not serviced during draw.
   DCHECK(IsActiveTree());
 
   return layers_with_copy_output_request_;
 }
 
 }  // namespace cc