Implement overscroll support for the virtual keyboard.

content/browser/renderer_host/render_widget_host_impl.cc

 // Copyright (c) 2012 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 "content/browser/renderer_host/render_widget_host_impl.h"
 
 #include <math.h>
 #include <set>
 #include <utility>
 
@@ skipping 583 matching lines @@
 
   gfx::Rect view_bounds = view_->GetViewBounds();
   gfx::Size new_size(view_bounds.size());
 
   gfx::Size old_physical_backing_size = physical_backing_size_;
   physical_backing_size_ = view_->GetPhysicalBackingSize();
   bool was_fullscreen = is_fullscreen_;
   is_fullscreen_ = IsFullscreen();
   float old_overdraw_bottom_height = overdraw_bottom_height_;
   overdraw_bottom_height_ = view_->GetOverdrawBottomHeight();
+  gfx::SizeF old_visible_viewport_size = visible_viewport_size_;

[sky, 2014/04/24 19:15:01]

SizeF->Size

[kevers, 2014/04/24 20:09:00]

Done.

+  visible_viewport_size_ = view_->GetVisibleViewportSize();
 
   bool size_changed = new_size != last_requested_size_;
   bool side_payload_changed =
       screen_info_out_of_date_ ||
       old_physical_backing_size != physical_backing_size_ ||
       was_fullscreen != is_fullscreen_ ||
-      old_overdraw_bottom_height != overdraw_bottom_height_;
+      old_overdraw_bottom_height != overdraw_bottom_height_ ||
+      old_visible_viewport_size != visible_viewport_size_;
 
   if (!size_changed && !side_payload_changed)
     return;
 
   if (!screen_info_) {
     screen_info_.reset(new blink::WebScreenInfo);
     GetWebScreenInfo(screen_info_.get());
   }
 
   // We don't expect to receive an ACK when the requested size or the physical
   // backing size is empty, or when the main viewport size didn't change.
   if (!new_size.IsEmpty() && !physical_backing_size_.IsEmpty() && size_changed)
     resize_ack_pending_ = g_check_for_pending_resize_ack;
 
   ViewMsg_Resize_Params params;
   params.screen_info = *screen_info_;
   params.new_size = new_size;
   params.physical_backing_size = physical_backing_size_;
   params.overdraw_bottom_height = overdraw_bottom_height_;
+  params.visible_viewport_size = visible_viewport_size_;
   params.resizer_rect = GetRootWindowResizerRect();
   params.is_fullscreen = is_fullscreen_;
   if (!Send(new ViewMsg_Resize(routing_id_, params))) {
     resize_ack_pending_ = false;
   } else {
     last_requested_size_ = new_size;
   }
 }
 
 void RenderWidgetHostImpl::ResizeRectChanged(const gfx::Rect& new_rect) {
@@ skipping 1769 matching lines @@
   }
 }
 
 SkBitmap::Config RenderWidgetHostImpl::PreferredReadbackFormat() {
   if (view_)
     return view_->PreferredReadbackFormat();
   return SkBitmap::kARGB_8888_Config;
 }
 
 }  // namespace content