fix for builds with webrtc disabled

content/renderer/media/media_stream_video_source.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_SOURCE_H_
 #define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_SOURCE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 60 matching lines @@
   static const char kMaxAspectRatio[];  // maxAspectRatio
   static const char kMaxWidth[];  // maxWidth
   static const char kMinWidth[];  // minWidthOnCaptureFormats
   static const char kMaxHeight[];  // maxHeight
   static const char kMinHeight[];  // minHeight
   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;
+  static const int kDefaultWidth = 640;

[DaleCurtis, 2015/03/04 21:26:04]

Because you don't want static values in a header file, each includer gets a new
copy:

http://stackoverflow.com/questions/92546/variable-declarations-in-header-file...

Which is why I suggested you make them enum values :)

[Mostyn Bramley-Moore, 2015/03/04 21:49:39]

I figured since it was only a few ints (as opposed to eg command line arg
strings) it wasn't so bad.  It builds for me locally but not on GOMA/the try
bots so the point is moot.  
Hmm, but don't you then need to cast to int every time you want to use these
enum values?  That would be annoying if the values are used often.

[DaleCurtis, 2015/03/04 21:54:23]

It depends on how they're used; in the majority of cases it'll be an implicit
conversion without issue.

[Mostyn Bramley-Moore, 2015/03/04 21:57:39]

OK.  I will try to eliminate the need for this later in the week as part of
crbug.com/463829.

+  static const int kDefaultHeight = 480;
+  static const int kDefaultFrameRate = 30;
+  static const int kUnknownFrameRate = 0;
 
  protected:
   void DoStopSource() override;
 
   // Sets ready state and notifies the ready state to all registered tracks.
   virtual void SetReadyState(blink::WebMediaStreamSource::ReadyState state);
 
   // Sets muted state and notifies it to all registered tracks.
   virtual void SetMutedState(bool state);
 
@@ skipping 79 matching lines @@
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<MediaStreamVideoSource> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamVideoSource);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_SOURCE_H_