fix for builds with webrtc disabled

content/renderer/media/media_stream_video_source.h

Index: content/renderer/media/media_stream_video_source.h
diff --git a/content/renderer/media/media_stream_video_source.h b/content/renderer/media/media_stream_video_source.h
index ba66e439cdf9f1b42db9a96de2d8e4a76cef4b93..4d0dba11fb01a37ba1f3c34ea240fc6f4bb726ee 100644
--- a/content/renderer/media/media_stream_video_source.h
+++ b/content/renderer/media/media_stream_video_source.h
@@ -76,12 +76,15 @@ class CONTENT_EXPORT MediaStreamVideoSource
   static const char kMaxFrameRate[];  // maxFrameRate
   static const char kMinFrameRate[];  // minFrameRate
 
-  // Default resolution. If no constraints are specified and the delegate
-  // support it, this is the resolution that will be used.
-  static const int kDefaultWidth;
-  static const int kDefaultHeight;
-  static const int kDefaultFrameRate;
-  static const int kUnknownFrameRate;
+  enum {
+    // Default resolution. If no constraints are specified and the delegate
+    // support it, this is the resolution that will be used.
+    kDefaultWidth = 640,
+    kDefaultHeight = 480,
+
+    kDefaultFrameRate = 30,
+    kUnknownFrameRate = 0,
+  };
 
  protected:
   void DoStopSource() override;