Add IPC::Sender and GetRoutingID() to WebContents for convenience and safety.

content/public/browser/web_contents.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_
 
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
 #include "base/process_util.h"
 #include "base/string16.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/page_navigator.h"
 #include "content/public/browser/save_page_type.h"
 #include "content/public/browser/web_ui.h"
+#include "ipc/ipc_sender.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/native_widget_types.h"
 #include "webkit/glue/window_open_disposition.h"
 
 namespace base {
 class PropertyBag;
 class TimeTicks;
 }
 
 namespace gfx {
@@ skipping 11 matching lines @@
 class InterstitialPage;
 class RenderProcessHost;
 class RenderViewHost;
 class RenderWidgetHostView;
 class SiteInstance;
 class WebContentsDelegate;
 class WebContentsView;
 struct RendererPreferences;
 
 // Describes what goes in the main content area of a tab.
-class WebContents : public PageNavigator {
+class WebContents : public PageNavigator, public IPC::Sender {
  public:
   // |base_web_contents| is used if we want to size the new WebContents's view
   // based on the view of an existing WebContents.  This can be NULL if not
   // needed.
   CONTENT_EXPORT static WebContents* Create(
       BrowserContext* browser_context,
       SiteInstance* site_instance,
       int routing_id,
       const WebContents* base_web_contents);
 
@@ skipping 44 matching lines @@
   // Gets the URL that is currently being displayed, if there is one.
   virtual const GURL& GetURL() const = 0;
 
   // Return the currently active RenderProcessHost and RenderViewHost. Each of
   // these may change over time.
   virtual RenderProcessHost* GetRenderProcessHost() const = 0;
 
   // Gets the current RenderViewHost for this tab.
   virtual RenderViewHost* GetRenderViewHost() const = 0;
 
+  // Gets the current RenderViewHost's routing id. Returns
+  // MSG_ROUTING_NONE when there is no RenderViewHost.
+  virtual int GetRoutingID() const = 0;
+
   // Returns the currently active RenderWidgetHostView. This may change over
   // time and can be NULL (during setup and teardown).
   virtual content::RenderWidgetHostView* GetRenderWidgetHostView() const = 0;
 
   // The WebContentsView will never change and is guaranteed non-NULL.
   virtual WebContentsView* GetView() const = 0;
 
   // Create a WebUI page for the given url. In most cases, this doesn't need to
   // be called by embedders since content will create its own WebUI objects as
   // necessary. However if the embedder wants to create its own WebUI object and
@@ skipping 265 matching lines @@
   // Focuses the location bar.
   virtual void SetFocusToLocationBar(bool select_all) = 0;
 
   // Does this have an opener associated with it?
   virtual bool HasOpener() const = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_