Move URL fixup to a preliminary phase that doesn't affect virtual URLs.

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 519ff938994e0be0e65e8128962630d0f203b359..6f7dd3724e251855678ccaee283342cdd25a27a9 100644
--- a/content/public/browser/content_browser_client.h
+++ b/content/public/browser/content_browser_client.h
@@ -504,6 +504,11 @@ class CONTENT_EXPORT ContentBrowserClient {
   // optionally add their own handlers.
   virtual void BrowserURLHandlerCreated(BrowserURLHandler* handler) {}
 
+  // Allows the embedder to perform minor cleanup on URLs before they are
+  // rewritten by the BrowserURLHandler.  This is important in cases that the
+  // cleanup should not be treated as part of the rewriting.
+  virtual GURL FixupURL(const GURL& url);
+
   // Clears browser cache.
   virtual void ClearCache(RenderViewHost* rvh) {}