Replace overdraw_bottom_height with top_controls_layout_height.

cc/trees/layer_tree_host.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.h"
 
 #include <algorithm>
 #include <stack>
 #include <string>
 
@@ skipping 88 matching lines @@
       next_ui_resource_id_(1),
       inside_begin_main_frame_(false),
       needs_full_tree_sync_(true),
       client_(client),
       source_frame_number_(0),
       rendering_stats_instrumentation_(RenderingStatsInstrumentation::Create()),
       output_surface_lost_(true),
       num_failed_recreate_attempts_(0),
       settings_(settings),
       debug_state_(settings.initial_debug_state),
-      overdraw_bottom_height_(0.f),
+      top_controls_layout_height_(0.f),
       device_scale_factor_(1.f),
       visible_(true),
       page_scale_factor_(1.f),
       min_page_scale_factor_(1.f),
       max_page_scale_factor_(1.f),
       has_gpu_rasterization_trigger_(false),
       content_is_suitable_for_gpu_rasterization_(true),
       gpu_rasterization_histogram_recorded_(false),
       background_color_(SK_ColorWHITE),
       has_transparent_background_(false),
@@ skipping 224 matching lines @@
                                 max_page_scale_factor_,
                                 page_scale_delta);
   sync_tree->set_sent_page_scale_delta(1.f);
 
   sync_tree->PassSwapPromises(&swap_promise_list_);
 
   host_impl->SetUseGpuRasterization(UseGpuRasterization());
   RecordGpuRasterizationHistogram();
 
   host_impl->SetViewportSize(device_viewport_size_);
-  host_impl->SetOverdrawBottomHeight(overdraw_bottom_height_);
+  host_impl->SetTopControlsLayoutHeight(top_controls_layout_height_);
   host_impl->SetDeviceScaleFactor(device_scale_factor_);
   host_impl->SetDebugState(debug_state_);
   if (pending_page_scale_animation_) {
     host_impl->StartPageScaleAnimation(
         pending_page_scale_animation_->target_offset,
         pending_page_scale_animation_->use_anchor,
         pending_page_scale_animation_->scale,
         pending_page_scale_animation_->duration);
     pending_page_scale_animation_.reset();
   }
@@ skipping 255 matching lines @@
 
 void LayerTreeHost::SetViewportSize(const gfx::Size& device_viewport_size) {
   if (device_viewport_size == device_viewport_size_)
     return;
 
   device_viewport_size_ = device_viewport_size;
 
   SetNeedsCommit();
 }
 
-void LayerTreeHost::SetOverdrawBottomHeight(float overdraw_bottom_height) {
-  if (overdraw_bottom_height_ == overdraw_bottom_height)
+void LayerTreeHost::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;
   SetNeedsCommit();
 }
 
 void LayerTreeHost::ApplyPageScaleDeltaFromImplSide(float page_scale_delta) {
   DCHECK(CommitRequested());
   page_scale_factor_ *= page_scale_delta;
 }
 
 void LayerTreeHost::SetPageScaleFactorAndLimits(float page_scale_factor,
                                                 float min_page_scale_factor,
@@ skipping 651 matching lines @@
   swap_promise_list_.push_back(swap_promise.Pass());
 }
 
 void LayerTreeHost::BreakSwapPromises(SwapPromise::DidNotSwapReason reason) {
   for (size_t i = 0; i < swap_promise_list_.size(); i++)
     swap_promise_list_[i]->DidNotSwap(reason);
   swap_promise_list_.clear();
 }
 
 }  // namespace cc