Add different error codes for getUserMedia.

chrome/browser/media/media_capture_devices_dispatcher.cc

Index: chrome/browser/media/media_capture_devices_dispatcher.cc
diff --git a/chrome/browser/media/media_capture_devices_dispatcher.cc b/chrome/browser/media/media_capture_devices_dispatcher.cc
index 10a67807eba00ece75edcecf586a63ab31af1a66..6690dbdff7d9b387ea0e48f4c6830597e9918ba3 100644
--- a/chrome/browser/media/media_capture_devices_dispatcher.cc
+++ b/chrome/browser/media/media_capture_devices_dispatcher.cc
@@ -300,7 +300,7 @@ void MediaCaptureDevicesDispatcher::ProcessDesktopCaptureAccessRequest(
   scoped_ptr<content::MediaStreamUI> ui;
 
   if (request.video_type != content::MEDIA_DESKTOP_VIDEO_CAPTURE) {
-    callback.Run(devices, ui.Pass());
+    callback.Run(devices, content::INVALID_STATE, ui.Pass());
     return;
   }
 
@@ -320,7 +320,7 @@ void MediaCaptureDevicesDispatcher::ProcessDesktopCaptureAccessRequest(
 
   // Received invalid device id.
   if (media_id.type == content::DesktopMediaID::TYPE_NONE) {
-    callback.Run(devices, ui.Pass());
+    callback.Run(devices, content::INVALID_STATE, ui.Pass());
     return;
   }
 
@@ -340,7 +340,7 @@ void MediaCaptureDevicesDispatcher::ProcessDesktopCaptureAccessRequest(
       devices, media_id, capture_audio, true,
       GetApplicationTitle(web_contents, extension));
 
-  callback.Run(devices, ui.Pass());
+  callback.Run(devices, content::OK, ui.Pass());
 }
 
 void MediaCaptureDevicesDispatcher::ProcessScreenCaptureAccessRequest(
@@ -429,7 +429,10 @@ void MediaCaptureDevicesDispatcher::ProcessScreenCaptureAccessRequest(
     }
   }
 
-  callback.Run(devices, ui.Pass());
+  callback.Run(
+    devices,
+    devices.empty() ? content::INVALID_STATE: content::OK,
+    ui.Pass());
 }
 
 void MediaCaptureDevicesDispatcher::ProcessTabCaptureAccessRequest(
@@ -450,7 +453,7 @@ void MediaCaptureDevicesDispatcher::ProcessTabCaptureAccessRequest(
       extensions::TabCaptureRegistry::Get(profile);
   if (!tab_capture_registry) {
     NOTREACHED();
-    callback.Run(devices, ui.Pass());
+    callback.Run(devices, content::INVALID_STATE, ui.Pass());
     return;
   }
   bool tab_capture_allowed =
@@ -475,7 +478,10 @@ void MediaCaptureDevicesDispatcher::ProcessTabCaptureAccessRequest(
     ui = media_stream_capture_indicator_->RegisterMediaStream(
         web_contents, devices);
   }
-  callback.Run(devices, ui.Pass());
+  callback.Run(
+    devices,
+    devices.empty() ? content::INVALID_STATE: content::OK,
+    ui.Pass());
 #endif  // !defined(OS_ANDROID)
 }
 
@@ -504,7 +510,10 @@ void MediaCaptureDevicesDispatcher::
     ui = media_stream_capture_indicator_->RegisterMediaStream(
         web_contents, devices);
   }
-  callback.Run(devices, ui.Pass());
+  callback.Run(
+    devices,
+    devices.empty() ? content::INVALID_STATE: content::OK,
+    ui.Pass());
 }
 
 void MediaCaptureDevicesDispatcher::ProcessRegularMediaAccessRequest(
@@ -559,6 +568,7 @@ void MediaCaptureDevicesDispatcher::ProcessQueuedAccessRequest(
 void MediaCaptureDevicesDispatcher::OnAccessRequestResponse(
     content::WebContents* web_contents,
     const content::MediaStreamDevices& devices,
+    content::MediaStreamRequestResult result,
     scoped_ptr<content::MediaStreamUI> ui) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
@@ -586,7 +596,7 @@ void MediaCaptureDevicesDispatcher::OnAccessRequestResponse(
                    base::Unretained(this), web_contents));
   }
 
-  callback.Run(devices, ui.Pass());
+  callback.Run(devices, result, ui.Pass());
 }
 
 void MediaCaptureDevicesDispatcher::GetDefaultDevicesForProfile(