Update constraints algorithm for screen capture.

content/renderer/media/media_stream_constraints_util_video_content.h

Index: content/renderer/media/media_stream_constraints_util_video_content.h
diff --git a/content/renderer/media/media_stream_constraints_util_video_content.h b/content/renderer/media/media_stream_constraints_util_video_content.h
index 28f5b7393ca332d2d8e9eb83c1d8d016eab7c0b5..c0522a1fb9f292c0c4f11e822e064891bdec103e 100644
--- a/content/renderer/media/media_stream_constraints_util_video_content.h
+++ b/content/renderer/media/media_stream_constraints_util_video_content.h
@@ -17,12 +17,15 @@ class WebMediaConstraints;
 
 namespace content {
 
+CONTENT_EXPORT extern const int kMinScreenCastDimension;
+CONTENT_EXPORT extern const int kMaxScreenCastDimension;
 CONTENT_EXPORT extern const int kDefaultScreenCastWidth;
 CONTENT_EXPORT extern const int kDefaultScreenCastHeight;
 CONTENT_EXPORT extern const double kDefaultScreenCastAspectRatio;
+
+CONTENT_EXPORT extern const double kMinScreenCastFrameRate;
+CONTENT_EXPORT extern const double kMaxScreenCastFrameRate;
 CONTENT_EXPORT extern const double kDefaultScreenCastFrameRate;
-CONTENT_EXPORT extern const int kMinScreenCastDimension;
-CONTENT_EXPORT extern const int kMaxScreenCastDimension;
 
 // This function performs source, source-settings and track-settings selection
 // for content video capture based on the given |constraints|.