Kill PropertyBag, switch WebContents to SupportsUserData.

chrome/browser/ui/tab_contents/tab_contents.h

Index: chrome/browser/ui/tab_contents/tab_contents.h
diff --git a/chrome/browser/ui/tab_contents/tab_contents.h b/chrome/browser/ui/tab_contents/tab_contents.h
index c9f4f79d8426102733ff462f033335aad070147f..0ad429c041889748801cd99a540083e36ddc35b2 100644
--- a/chrome/browser/ui/tab_contents/tab_contents.h
+++ b/chrome/browser/ui/tab_contents/tab_contents.h
@@ -9,7 +9,6 @@
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/property_bag.h"
 #include "content/public/browser/web_contents_observer.h"
 
 class AlternateErrorPageTabObserver;
@@ -258,10 +257,6 @@ class TabContents : public content::WebContentsObserver {
   virtual void UserAgentOverrideSet(const std::string& user_agent) OVERRIDE;
 
  private:
-  // Used to retrieve this object from |web_contents_|, which is placed in
-  // its property bag to avoid adding additional interfaces.
-  static base::PropertyAccessor<TabContents*>* property_accessor();
-
   // Tab Helpers ---------------------------------------------------------------
   // (These provide API for callers and have a getter function listed in the
   // "Tab Helpers" section in the member functions area, above.)