Extract minimal RenderViewHost interface for embedders, leaving

content/browser/renderer_host/render_widget_host_view_aura.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_view_aura.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "content/browser/renderer_host/backing_store_skia.h"
 #include "content/browser/renderer_host/image_transport_factory.h"
@@ skipping 101 matching lines @@
  private:
   RenderWidgetHostViewAura* view_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowObserver);
 };
 
 ////////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewAura, public:
 
 RenderWidgetHostViewAura::RenderWidgetHostViewAura(RenderWidgetHost* host)
-    : ALLOW_THIS_IN_INITIALIZER_LIST(window_(new aura::Window(this))),
+    : host_(RenderWidgetHostImpl::From(host)),
+      ALLOW_THIS_IN_INITIALIZER_LIST(window_(new aura::Window(this))),
       is_fullscreen_(false),
       popup_parent_host_view_(NULL),
       popup_child_host_view_(NULL),
       is_loading_(false),
       text_input_type_(ui::TEXT_INPUT_TYPE_NONE),
       can_compose_inline_(true),
       has_composition_text_(false),
       current_surface_(0),
       paint_canvas_(NULL),
       synthetic_move_sent_(false) {
-  host_ = static_cast<RenderWidgetHostImpl*>(host);
   host_->SetView(this);
   window_observer_.reset(new WindowObserver(this));
   window_->AddObserver(window_observer_.get());
   aura::client::SetTooltipText(window_, &tooltip_);
   aura::client::SetActivationDelegate(window_, this);
 }
 
 RenderWidgetHostViewAura::~RenderWidgetHostViewAura() {
   window_->RemoveObserver(window_observer_.get());
   UnlockMouse();
@@ skipping 906 matching lines @@
     WebKit::WebScreenInfo* results) {
   const gfx::Size size = gfx::Screen::GetPrimaryMonitorSize();
   results->rect = WebKit::WebRect(0, 0, size.width(), size.height());
   results->availableRect = results->rect;
   // TODO(derat): Don't hardcode this?
   results->depth = 24;
   results->depthPerComponent = 8;
   results->verticalDPI = 96;
   results->horizontalDPI = 96;
 }