Allow override of user agent depending on url.

content/public/renderer/render_frame_observer.h

Index: content/public/renderer/render_frame_observer.h
diff --git a/content/public/renderer/render_frame_observer.h b/content/public/renderer/render_frame_observer.h
index b01856e225d7bcb23e50eab2201765f0dc5fb35f..308f2257be241978336ad00e40bd2e0811843a58 100644
--- a/content/public/renderer/render_frame_observer.h
+++ b/content/public/renderer/render_frame_observer.h
@@ -11,6 +11,7 @@
 #include "content/common/content_export.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_sender.h"
+#include "url/gurl.h"

[jochen (gone - plz use gerrit), 2014/10/02 09:24:03]

should be enough to forward declare GURL, no?

 #include "v8/include/v8.h"
 
 namespace blink {
@@ -74,6 +75,10 @@ class CONTENT_EXPORT RenderFrameObserver : public IPC::Listener,
   // Called when a compositor frame has committed.
   virtual void DidCommitCompositorFrame() {}
 
+  // Returns a user agent override specific for |url|, or empty string if
+  // default user agent should be used.
+  virtual std::string GetUserAgentOverrideForURL(const GURL& url);
+
   // IPC::Listener implementation.
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;