Media Stream Image Capture (4): wire takePhoto and implement in FakeVCDevice

content/browser/renderer_host/media/media_stream_manager.h

Index: content/browser/renderer_host/media/media_stream_manager.h
diff --git a/content/browser/renderer_host/media/media_stream_manager.h b/content/browser/renderer_host/media/media_stream_manager.h
index a1f22722f78356d2f767207213034be4ad585ce4..8f6dc66b1bdfc895dcd199fa044c6fb5d86e374a 100644
--- a/content/browser/renderer_host/media/media_stream_manager.h
+++ b/content/browser/renderer_host/media/media_stream_manager.h
@@ -177,6 +177,10 @@ class CONTENT_EXPORT MediaStreamManager
                                    const std::string& source_id,
                                    std::string* device_id) const;
 
+  // Find |device_id| in the list of |requests_|, and returns its session id,
+  // or StreamDeviceInfo::kNoId if not found.
+  int VideoDeviceIdToSessionId(const std::string& device_id) const;
+
   // Called by UI to make sure the device monitor is started so that UI receive
   // notifications about device changes.
   void EnsureDeviceMonitorStarted();