Refactor the content interface for RequestMediaAccessPermission.

content/public/common/media_stream_request.h

Index: content/public/common/media_stream_request.h
diff --git a/content/public/common/media_stream_request.h b/content/public/common/media_stream_request.h
index e7010b88308a13d114a945544d6620933138fda5..2f20bcb0bd4d9da36f68b885d59e2ae2af229dd5 100644
--- a/content/public/common/media_stream_request.h
+++ b/content/public/common/media_stream_request.h
@@ -10,6 +10,7 @@
 #include <vector>
 
 #include "base/basictypes.h"
+#include "base/callback.h"
 #include "content/common/content_export.h"
 #include "googleurl/src/gurl.h"
 
@@ -45,6 +46,8 @@ typedef std::vector<MediaStreamDevice> MediaStreamDevices;
 typedef std::map<MediaStreamDeviceType, MediaStreamDevices>
     MediaStreamDeviceMap;
 
+typedef base::Callback< void(const MediaStreamDevices&) > MediaResponseCallback;

[jam, 2012/06/11 05:31:57]

nit: I realize you put this here because it's used by both
render_view_host_delegate.h and web_contents_delegate.h. but this is an odd
place, since 1) it's only used in \browser, and 2) it's not used here. I think
it would be better to duplicate it in the RVHD.

[Evan Stade, 2012/06/12 00:00:46]

done, although it leads to the somewhat funky include of web_contents_delegate.h
in media_stream_infobar_delegate.h

+
 // Represents a request for media streams (audio/video).
 struct CONTENT_EXPORT MediaStreamRequest {
   MediaStreamRequest(