Makes content handlers see requestor url

mojo/runner/context.h

Index: mojo/runner/context.h
diff --git a/mojo/runner/context.h b/mojo/runner/context.h
index 06a27542113a2df7bd1a02b58928349fba85bf2d..1dd54cb5484f51b2497b7e776f145c76ee3fa56c 100644
--- a/mojo/runner/context.h
+++ b/mojo/runner/context.h
@@ -67,6 +67,9 @@ class Context : public shell::ApplicationManager::Delegate,
   // ApplicationManager::Delegate overrides.
   GURL ResolveMappings(const GURL& url) override;
   GURL ResolveMojoURL(const GURL& url) override;
+  bool CreateFetcher(
+      const GURL& url,
+      const shell::Fetcher::FetchCallback& loader_callback) override;
 
   // ProcessDelegate implementation.
   void OnShutdownComplete() override;