Replace overdraw_bottom_height with top_controls_layout_height.

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 <algorithm>
 #include <limits>
 
 #include "base/basictypes.h"
@@ skipping 232 matching lines @@
       paint_time_counter_(PaintTimeCounter::Create()),
       memory_history_(MemoryHistory::Create()),
       debug_rect_history_(DebugRectHistory::Create()),
       texture_mailbox_deleter_(new TextureMailboxDeleter(
           proxy_->HasImplThread() ? proxy_->ImplThreadTaskRunner()
                                   : proxy_->MainThreadTaskRunner())),
       max_memory_needed_bytes_(0),
       zero_budget_(false),
       device_scale_factor_(1.f),
       overhang_ui_resource_id_(0),
-      overdraw_bottom_height_(0.f),
+      top_controls_layout_height_(0.f),
       resourceless_software_draw_(false),
       begin_impl_frame_interval_(BeginFrameArgs::DefaultInterval()),
       animation_registrar_(AnimationRegistrar::Create()),
       rendering_stats_instrumentation_(rendering_stats_instrumentation),
       micro_benchmark_controller_(this),
       need_to_update_visible_tiles_before_draw_(false),
       have_valid_output_surface_(false),
       shared_bitmap_manager_(manager),
       id_(id),
       transfer_buffer_memory_limit_(0u) {
@@ skipping 164 matching lines @@
 void LayerTreeHostImpl::StartPageScaleAnimation(
     const gfx::Vector2d& target_offset,
     bool anchor_point,
     float page_scale,
     base::TimeDelta duration) {
   if (!InnerViewportScrollLayer())
     return;
 
   gfx::Vector2dF scroll_total = active_tree_->TotalScrollOffset();
   gfx::SizeF scaled_scrollable_size = active_tree_->ScrollableSize();
-  gfx::SizeF viewport_size = UnscaledScrollableViewportSize();
+  gfx::SizeF viewport_size =
+      active_tree_->InnerViewportContainerLayer()->bounds();
 
   // Easing constants experimentally determined.
   scoped_ptr<TimingFunction> timing_function =
       CubicBezierTimingFunction::Create(.8, 0, .3, .9).PassAs<TimingFunction>();
 
   page_scale_animation_ =
       PageScaleAnimation::Create(scroll_total,
                                  active_tree_->total_page_scale_factor(),
                                  viewport_size,
                                  scaled_scrollable_size,
@@ skipping 1013 matching lines @@
   metadata.page_scale_factor = active_tree_->total_page_scale_factor();
   metadata.scrollable_viewport_size = active_tree_->ScrollableViewportSize();
   metadata.root_layer_size = active_tree_->ScrollableSize();
   metadata.min_page_scale_factor = active_tree_->min_page_scale_factor();
   metadata.max_page_scale_factor = active_tree_->max_page_scale_factor();
   if (top_controls_manager_) {
     metadata.location_bar_offset =
         gfx::Vector2dF(0.f, top_controls_manager_->controls_top_offset());
     metadata.location_bar_content_translation =
         gfx::Vector2dF(0.f, top_controls_manager_->content_top_offset());
-    metadata.overdraw_bottom_height = overdraw_bottom_height_;
   }
 
   active_tree_->GetViewportSelection(&metadata.selection_start,
                                      &metadata.selection_end);
 
   if (!InnerViewportScrollLayer())
     return metadata;
 
   metadata.root_scroll_offset = active_tree_->TotalScrollOffset();
 
@@ skipping 192 matching lines @@
 }
 
 void LayerTreeHostImpl::WillBeginImplFrame(const BeginFrameArgs& args) {
   // Sample the frame time now. This time will be used for updating animations
   // when we draw.
   UpdateCurrentFrameTime();
   // Cache the begin impl frame interval
   begin_impl_frame_interval_ = args.interval;
 }
 
-gfx::SizeF LayerTreeHostImpl::ComputeInnerViewportContainerSize() const {
-  gfx::SizeF dip_size =
-      gfx::ScaleSize(device_viewport_size_, 1.f / device_scale_factor());
-
-  float top_offset =
-      top_controls_manager_ ? top_controls_manager_->content_top_offset() : 0.f;
-
-  return gfx::SizeF(dip_size.width(),
-                    dip_size.height() - top_offset - overdraw_bottom_height_);
-}
-
 void LayerTreeHostImpl::UpdateInnerViewportContainerSize() {
   LayerImpl* container_layer = active_tree_->InnerViewportContainerLayer();
   if (!container_layer)
     return;
 
-  // We pass the value returned from UnscaledScrollableViewportSize() here as
-  // it accounts for scrollbar dimensions when
-  // container_layer->masks_to_bounds() is set.
-  container_layer->SetTemporaryImplBounds(UnscaledScrollableViewportSize());
-}
-
-gfx::SizeF LayerTreeHostImpl::UnscaledScrollableViewportSize() const {
-  // Use the root container layer bounds if it clips to them, otherwise, the
-  // true viewport size should be used.
-  LayerImpl* container_layer = active_tree_->InnerViewportContainerLayer();
-  if (container_layer && container_layer->masks_to_bounds()) {
-    DCHECK(!top_controls_manager_);
-    DCHECK_EQ(0, overdraw_bottom_height_);
-    return container_layer->bounds();
-  }
-
-  return ComputeInnerViewportContainerSize();
-}
-
-float LayerTreeHostImpl::VerticalAdjust() const {
-  if (!active_tree_->InnerViewportContainerLayer())
-    return 0;
-
-  return active_tree_->InnerViewportContainerLayer()->BoundsDelta().y();
+  if (top_controls_manager_)
+    container_layer->SetBoundsDelta(
+        gfx::Vector2dF(0,
+                       top_controls_layout_height_ -
+                           top_controls_manager_->content_top_offset()));
 }
 
 void LayerTreeHostImpl::DidLoseOutputSurface() {
   if (!have_valid_output_surface_)
     return;
   have_valid_output_surface_ = false;
   if (resource_provider_)
     resource_provider_->DidLoseOutputSurface();
   // TODO(jamesr): The renderer_ check is needed to make some of the
   // LayerTreeHostContextTest tests pass, but shouldn't be necessary (or
@@ skipping 456 matching lines @@
     active_tree_->SetViewportSizeInvalid();
 
   device_viewport_size_ = device_viewport_size;
 
   UpdateInnerViewportContainerSize();
   client_->OnCanDrawStateChanged(CanDraw());
   SetFullRootLayerDamage();
   active_tree_->set_needs_update_draw_properties();
 }
 
-void LayerTreeHostImpl::SetOverdrawBottomHeight(float overdraw_bottom_height) {
-  if (overdraw_bottom_height == overdraw_bottom_height_)
+void LayerTreeHostImpl::SetTopControlsLayoutHeight(
+    float top_controls_layout_height) {
+  if (top_controls_layout_height_ == top_controls_layout_height)
     return;
-  overdraw_bottom_height_ = overdraw_bottom_height;
+  top_controls_layout_height_ = top_controls_layout_height;
 
   UpdateInnerViewportContainerSize();
   SetFullRootLayerDamage();
 }
 
 void LayerTreeHostImpl::SetOverhangUIResource(
     UIResourceId overhang_ui_resource_id,
     const gfx::Size& overhang_ui_resource_size) {
   overhang_ui_resource_id_ = overhang_ui_resource_id;
   overhang_ui_resource_size_ = overhang_ui_resource_size;
 }
 
 void LayerTreeHostImpl::SetDeviceScaleFactor(float device_scale_factor) {
   if (device_scale_factor == device_scale_factor_)
     return;
   device_scale_factor_ = device_scale_factor;
 
-  UpdateInnerViewportContainerSize();
   SetFullRootLayerDamage();
 }
 
 const gfx::Rect LayerTreeHostImpl::ViewportRectForTilePriority() const {
   if (viewport_rect_for_tile_priority_.IsEmpty())
     return DeviceViewport();
 
   return viewport_rect_for_tile_priority_;
 }
 
@@ skipping 1173 matching lines @@
 }
 
 void LayerTreeHostImpl::UnregisterPictureLayerImpl(PictureLayerImpl* layer) {
   std::vector<PictureLayerImpl*>::iterator it =
       std::find(picture_layers_.begin(), picture_layers_.end(), layer);
   DCHECK(it != picture_layers_.end());
   picture_layers_.erase(it);
 }
 
 }  // namespace cc