Refactor the content interface for RequestMediaAccessPermission.

content/public/browser/web_contents_delegate.h

Index: content/public/browser/web_contents_delegate.h
diff --git a/content/public/browser/web_contents_delegate.h b/content/public/browser/web_contents_delegate.h
index 6c3b6f8198fcc99e88a8ed31b310be0b455b44ff..5fc03dae9570d2033e997fb83af663670b2f5e52 100644
--- a/content/public/browser/web_contents_delegate.h
+++ b/content/public/browser/web_contents_delegate.h
@@ -10,9 +10,11 @@
 #include <string>
 
 #include "base/basictypes.h"
+#include "base/callback.h"
 #include "base/string16.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/navigation_type.h"
+#include "content/public/common/media_stream_request.h"
 #include "content/public/common/page_transition_types.h"
 #include "content/public/common/window_container_type.h"
 #include "third_party/skia/include/core/SkColor.h"
@@ -60,6 +62,8 @@ namespace content {
 
 struct OpenURLParams;
 
+typedef base::Callback< void(const MediaStreamDevices&) > MediaResponseCallback;
+
 // Objects implement this interface to get notified about changes in the
 // WebContents and to provide necessary functionality.
 class CONTENT_EXPORT WebContentsDelegate {
@@ -407,12 +411,21 @@ class CONTENT_EXPORT WebContentsDelegate {
   // contents.
   virtual void RequestToLockMouse(WebContents* web_contents,
                                   bool user_gesture,
-                                  bool last_unlocked_by_target) {
-  }
+                                  bool last_unlocked_by_target) {}
 
   // Notification that the page has lost the mouse lock.
   virtual void LostMouseLock() {}
 
+  // Asks permission to use the camera and/or microphone. If permission is
+  // granted, a call should be made to |callback| with the devices. If the
+  // request is denied, a call should be made to |callback| with an empty list
+  // of devices. |request| has the details of the request (e.g. which of audio
+  // and/or video devices are requested, and lists of available devices).
+  virtual void RequestMediaAccessPermission(
+      WebContents* web_contents,
+      const MediaStreamRequest* request,
+      const MediaResponseCallback& callback) {}
+
  protected:
   virtual ~WebContentsDelegate();