renderer_host: Remove CanBlur method.

chrome/browser/tab_contents/tab_contents_delegate.h

Index: chrome/browser/tab_contents/tab_contents_delegate.h
diff --git a/chrome/browser/tab_contents/tab_contents_delegate.h b/chrome/browser/tab_contents/tab_contents_delegate.h
index 9f80870bdd534c6e452ae39fb5c89885dcaaed3e..9d7c3f0f5aa597c7550c9fcf6713adfe0c803a7a 100644
--- a/chrome/browser/tab_contents/tab_contents_delegate.h
+++ b/chrome/browser/tab_contents/tab_contents_delegate.h
@@ -127,10 +127,6 @@ class TabContentsDelegate : public AutomationResourceRoutingDelegate {
   // a TabContents with a valid WebApp set.
   virtual void ConvertContentsToApplication(TabContents* source) { }
 
-  // Whether this tab can be blurred through a javascript obj.blur()
-  // call. ConstrainedWindows shouldn't be able to be blurred.
-  virtual bool CanBlur() const { return true; }
-
   // Whether the specified tab can be reloaded.
   // Reloading can be disabled e. g. for the DevTools window.
   virtual bool CanReloadContents(TabContents* source) const { return true; }