Delete code involving overdraw bottom height.

chrome/browser/android/compositor/compositor_view.cc

 // Copyright 2015 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 "chrome/browser/android/compositor/compositor_view.h"
 
 #include <vector>
 
 #include <android/bitmap.h>
 #include <android/native_window_jni.h>
@@ skipping 70 matching lines @@
                                LayerTitleCache* layer_title_cache,
                                TabContentManager* tab_content_manager)
     : layer_title_cache_(layer_title_cache),
       tab_content_manager_(tab_content_manager),
       root_layer_(
           cc::SolidColorLayer::Create(content::Compositor::LayerSettings())),
       scene_layer_(nullptr),
       current_surface_format_(0),
       content_width_(0),
       content_height_(0),
-      overdraw_bottom_height_(0),
       overlay_video_mode_(false),
       empty_background_color_(empty_background_color),
       weak_factory_(this) {
   content::BrowserChildProcessObserver::Add(this);
   obj_.Reset(env, obj);
   compositor_.reset(content::Compositor::Create(this, window_android));
 
   toolbar_layer_ = ToolbarLayer::Create(&(compositor_->GetResourceManager()));
 
   root_layer_->SetIsDrawable(true);
@@ skipping 78 matching lines @@
 }
 
 void CompositorView::SetLayoutViewport(JNIEnv* env,
                                        const JavaParamRef<jobject>& object,
                                        jfloat x,
                                        jfloat y,
                                        jfloat width,
                                        jfloat height,
                                        jfloat visible_x_offset,
                                        jfloat visible_y_offset,
-                                       jfloat overdraw_bottom_height,
                                        jfloat dp_to_pixel) {
-  overdraw_bottom_height_ = overdraw_bottom_height;
   compositor_->setDeviceScaleFactor(dp_to_pixel);
   root_layer_->SetBounds(gfx::Size(content_width_, content_height_));
 }
 
 void CompositorView::SetBackground(bool visible, SkColor color) {
   if (overlay_video_mode_)
     visible = false;
   root_layer_->SetBackgroundColor(color);
   root_layer_->SetIsDrawable(visible);
 }
@@ skipping 35 matching lines @@
   } else {
 #ifndef NDEBUG
     // This should not happen. Setting red background just for debugging.
     SetBackground(true, SK_ColorRED);
 #else
     SetBackground(true, SK_ColorBLACK);
 #endif
   }
 }
 
-int CompositorView::GetUsableContentHeight() {
-  return std::max(content_height_ - overdraw_bottom_height_, 0);
-}
-
 void CompositorView::UpdateToolbarLayer(JNIEnv* env,
                                         const JavaParamRef<jobject>& object,
                                         jint toolbar_resource_id,
                                         jint toolbar_background_color,
                                         jint url_bar_resource_id,
                                         jfloat url_bar_alpha,
                                         jfloat top_offset,
                                         jfloat brightness,
                                         bool visible,
                                         bool show_shadow) {
@@ skipping 63 matching lines @@
   // through here but through BrowserChildProcessHostDisconnected() instead.
 }
 
 // Register native methods
 bool RegisterCompositorView(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace android
 }  // namespace chrome