AVFoundation: Check selector when testing if max frame rate setting is supported.

media/video/capture/mac/video_capture_device_avfoundation_mac.mm

Index: media/video/capture/mac/video_capture_device_avfoundation_mac.mm
diff --git a/media/video/capture/mac/video_capture_device_avfoundation_mac.mm b/media/video/capture/mac/video_capture_device_avfoundation_mac.mm
index f780958b858da381a8f9ea2ef403648d0e401852..f99ac61d62deb89bc037940b2fcc06a33e847f45 100644
--- a/media/video/capture/mac/video_capture_device_avfoundation_mac.mm
+++ b/media/video/capture/mac/video_capture_device_avfoundation_mac.mm
@@ -8,6 +8,7 @@
 
 #include "base/logging.h"
 #include "base/mac/foundation_util.h"
+#include "base/mac/scoped_nsexception_enabler.h"

[Robert Sesek, 2013/12/16 17:20:57]

Remove

 #include "media/video/capture/mac/video_capture_device_mac.h"
 #include "ui/gfx/size.h"
 
@@ -168,7 +169,11 @@
     [captureConnection setVideoMinFrameDuration:
         CoreMediaGlue::CMTimeMake(1, frameRate)];
   }
-  if ([captureConnection isVideoMaxFrameDurationSupported]) {
+  // TODO(mcasas): Check selector existence, related to bugs
+  // http://crbug.com/327532 and http://crbug.com/328096.
+  if ([captureConnection
+           respondsToSelector:@selector(isVideoMaxFrameDurationSupported)] &&
+      [captureConnection isVideoMaxFrameDurationSupported]) {
     [captureConnection setVideoMaxFrameDuration:
         CoreMediaGlue::CMTimeMake(1, frameRate)];
   }