Switch CoreTabHelper to use WebContentsUserData.

chrome/browser/ui/tab_contents/core_tab_helper_delegate.cc

Index: chrome/browser/ui/tab_contents/core_tab_helper_delegate.cc
diff --git a/chrome/browser/ui/tab_contents/core_tab_helper_delegate.cc b/chrome/browser/ui/tab_contents/core_tab_helper_delegate.cc
index 56e50ead3536d61c2c5d091e246eb6fc7c32e79c..0aca9f5e20b86d8bfe7f79529544cba66e40cb48 100644
--- a/chrome/browser/ui/tab_contents/core_tab_helper_delegate.cc
+++ b/chrome/browser/ui/tab_contents/core_tab_helper_delegate.cc
@@ -7,14 +7,17 @@
 CoreTabHelperDelegate::~CoreTabHelperDelegate() {
 }
 
-void CoreTabHelperDelegate::SwapTabContents(TabContents* old_tc,
-                                            TabContents* new_tc) {
+void CoreTabHelperDelegate::SwapTabContents(
+    content::WebContents* old_contents,
+    content::WebContents* new_contents) {
 }
 
-bool CoreTabHelperDelegate::CanReloadContents(TabContents* source) const {
+bool CoreTabHelperDelegate::CanReloadContents(
+    content::WebContents* web_contents) const {
   return true;
 }
 
-bool CoreTabHelperDelegate::CanSaveContents(TabContents* source) const {
+bool CoreTabHelperDelegate::CanSaveContents(
+    content::WebContents* web_contents) const {
   return true;
 }