ImageCapture: Implement takePhoto() for Mac AVFoundation

media/base/mac/avfoundation_glue.mm

 // Copyright 2013 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.
 
 #import "media/base/mac/avfoundation_glue.h"
 
 #import <AVFoundation/AVFoundation.h>
 #include <dlfcn.h>
 #include <stddef.h>
 
@@ skipping 149 matching lines @@
 }
 
 Class AVFoundationGlue::AVCaptureSessionClass() {
   return [AVFoundationBundle() classNamed:@"AVCaptureSession"];
 }
 
 Class AVFoundationGlue::AVCaptureVideoDataOutputClass() {
   return [AVFoundationBundle() classNamed:@"AVCaptureVideoDataOutput"];
 }
 
+Class AVFoundationGlue::AVCaptureStillImageOutputClass() {
+  return [AVFoundationBundle() classNamed:@"AVCaptureStillImageOutput"];
+}
+
 @implementation AVCaptureDeviceGlue
 
 + (NSArray*)devices {
   Class avcClass =
       [AVFoundationGlue::AVFoundationBundle() classNamed:@"AVCaptureDevice"];
   if ([avcClass respondsToSelector:@selector(devices)]) {
     return [avcClass performSelector:@selector(devices)];
   }
   return nil;
 }
@@ skipping 10 matching lines @@
 @implementation AVCaptureDeviceInputGlue
 
 + (CrAVCaptureDeviceInput*)deviceInputWithDevice:(CrAVCaptureDevice*)device
                                            error:(NSError**)outError {
   return [[AVFoundationGlue::AVFoundationBundle()
       classNamed:@"AVCaptureDeviceInput"] deviceInputWithDevice:device
                                                           error:outError];
 }
 
 @end  // @implementation AVCaptureDeviceInputGlue