Move implementation from header to source.

chrome/browser/tab_contents/tab_contents.h

Index: chrome/browser/tab_contents/tab_contents.h
diff --git a/chrome/browser/tab_contents/tab_contents.h b/chrome/browser/tab_contents/tab_contents.h
index 304a6d276cd1f7b97d7cbb03f53c7f171be43ccb..e01772f5cb0137e37579cb8e30cf5bfdd30fa5bb 100644
--- a/chrome/browser/tab_contents/tab_contents.h
+++ b/chrome/browser/tab_contents/tab_contents.h
@@ -680,8 +680,8 @@ class TabContents : public PageNavigator,
                                   bool success,
                                   const std::wstring& prompt);
   virtual void SetSuppressMessageBoxes(bool suppress_message_boxes);
-  virtual TabContents* AsTabContents() { return this; }
-  virtual ExtensionHost* AsExtensionHost() { return NULL; }
+  virtual TabContents* AsTabContents();
+  virtual ExtensionHost* AsExtensionHost();
 
   // The BookmarkDragDelegate is used to forward bookmark drag and drop events
   // to extensions.
@@ -983,20 +983,12 @@ class TabContents : public PageNavigator,
       bool proceed,
       bool* proceed_to_fire_unload);
   virtual void DidStartLoadingFromRenderManager(
-      RenderViewHost* render_view_host) {
-    DidStartLoading();
-  }
+      RenderViewHost* render_view_host);
   virtual void RenderViewGoneFromRenderManager(
-      RenderViewHost* render_view_host) {
-    RenderViewGone(render_view_host);
-  }
+      RenderViewHost* render_view_host);
   virtual void UpdateRenderViewSizeForRenderManager();
-  virtual void NotifySwappedFromRenderManager() {
-    NotifySwapped();
-  }
-  virtual NavigationController& GetControllerForRenderManager() {
-    return controller();
-  }
+  virtual void NotifySwappedFromRenderManager();
+  virtual NavigationController& GetControllerForRenderManager();
   virtual DOMUI* CreateDOMUIForRenderManager(const GURL& url);
   virtual NavigationEntry* GetLastCommittedNavigationEntryForRenderManager();