Revert 252883 "Remove tests and code for showModalDialog"

content/browser/renderer_host/render_view_host_impl.h

Index: content/browser/renderer_host/render_view_host_impl.h
diff --git a/content/browser/renderer_host/render_view_host_impl.h b/content/browser/renderer_host/render_view_host_impl.h
index 383e4175e0982d04a40e81371f34e88ae9898e79..498defaf64a50e6fabb47eca6c1566a9ad85da06 100644
--- a/content/browser/renderer_host/render_view_host_impl.h
+++ b/content/browser/renderer_host/render_view_host_impl.h
@@ -394,6 +394,7 @@ class CONTENT_EXPORT RenderViewHostImpl
 
   // RenderWidgetHost public overrides.
   virtual void Init() OVERRIDE;
+  virtual void Shutdown() OVERRIDE;
   virtual bool IsRenderView() const OVERRIDE;
   virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
   virtual void GotFocus() OVERRIDE;
@@ -519,6 +520,7 @@ class CONTENT_EXPORT RenderViewHostImpl
                   bool user_gesture);
   void OnShowWidget(int route_id, const gfx::Rect& initial_pos);
   void OnShowFullscreenWidget(int route_id);
+  void OnRunModal(int opener_id, IPC::Message* reply_msg);
   void OnRenderViewReady();
   void OnRenderProcessGone(int status, int error_code);
   void OnUpdateState(int32 page_id, const PageState& state);
@@ -660,6 +662,12 @@ class CONTENT_EXPORT RenderViewHostImpl
   // Routing ID for the main frame's RenderFrameHost.
   int main_frame_routing_id_;
 
+  // If we were asked to RunModal, then this will hold the reply_msg that we
+  // must return to the renderer to unblock it.
+  IPC::Message* run_modal_reply_msg_;
+  // This will hold the routing id of the RenderView that opened us.
+  int run_modal_opener_id_;
+
   // Set to true when there is a pending ViewMsg_ShouldClose message.  This
   // ensures we don't spam the renderer with multiple beforeunload requests.
   // When either this value or IsWaitingForUnloadACK is true, the value of