Rename TabContents::controller() to GetController and put it into the WebContents interface.

content/public/browser/web_contents.h

Index: content/public/browser/web_contents.h
===================================================================
--- content/public/browser/web_contents.h	(revision 115228)
+++ content/public/browser/web_contents.h	(working copy)
@@ -9,6 +9,7 @@
 #include "base/string16.h"
 #include "content/common/content_export.h"
 
+class NavigationController;
 class RenderViewHost;
 
 namespace base {
@@ -17,6 +18,7 @@
 
 namespace content {
 
+class RenderProcessHost;
 // TODO(jam): of course we will have to rename TabContentsView etc to use
 // WebPage.
 class WebContentsDelegate;
@@ -36,6 +38,17 @@
   virtual WebContentsDelegate* GetDelegate() = 0;
   virtual void SetDelegate(WebContentsDelegate* delegate) = 0;
 
+  // Gets the controller for this tab contents.
+  virtual NavigationController& GetController() = 0;
+  virtual const NavigationController& GetController() const = 0;
+
+  // Allows overriding the type of this tab.
+  virtual void SetViewType(content::ViewType type) = 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;
 };