Avoid using ContentBrowserClient::IsIllegalOrigin in ResourceDispatcherHost.

content/public/browser/content_browser_client.h

Index: content/public/browser/content_browser_client.h
diff --git a/content/public/browser/content_browser_client.h b/content/public/browser/content_browser_client.h
index 6c7f8e6fb4a602db4b5edb4926b353f918085362..6117e54fc696e3e5b44415e2efe871bf1e3839b1 100644
--- a/content/public/browser/content_browser_client.h
+++ b/content/public/browser/content_browser_client.h
@@ -231,14 +231,6 @@ class CONTENT_EXPORT ContentBrowserClient {
   // This is called on the UI thread.
   virtual bool CanCommitURL(RenderProcessHost* process_host, const GURL& url);
 
-  // Returns true if no URL within |origin| is allowed to commit in the given
-  // process.  Must return false if there exists at least one URL in |origin|
-  // that is allowed to commit.
-  // This is called on the IO thread.
-  virtual bool IsIllegalOrigin(ResourceContext* resource_context,
-                               int child_process_id,
-                               const GURL& origin);
-
   // Returns whether a URL should be allowed to open from a specific context.
   // This also applies in cases where the new URL will open in another process.
   virtual bool ShouldAllowOpenURL(SiteInstance* site_instance, const GURL& url);