Mac Video Capture: correct to float the erroneous handling of frame rate as int.

media/video/capture/mac/video_capture_device_qtkit_mac.h

 // Copyright (c) 2011 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.
 
 // VideoCaptureDeviceQTKit implements all QTKit related code for
 // communicating with a QTKit capture device.
 
 #ifndef MEDIA_VIDEO_CAPTURE_MAC_VIDEO_CAPTURE_DEVICE_QTKIT_MAC_H_
 #define MEDIA_VIDEO_CAPTURE_MAC_VIDEO_CAPTURE_DEVICE_QTKIT_MAC_H_
 
 #import <Foundation/Foundation.h>
 
 #include <vector>
 
 #import "media/video/capture/mac/platform_video_capturing_mac.h"
 
 namespace media {
 class VideoCaptureDeviceMac;
 }
 
 @class QTCaptureDeviceInput;
 @class QTCaptureSession;
 
 @interface VideoCaptureDeviceQTKit : NSObject<PlatformVideoCapturingMac> {
  @private
   // Settings.
-  int frameRate_;
+  float frameRate_;
 
   NSLock *lock_;
   media::VideoCaptureDeviceMac *frameReceiver_;
 
   // QTKit variables.
   QTCaptureSession *captureSession_;
   QTCaptureDeviceInput *captureDeviceInput_;
 
   // Buffer for adjusting frames which do not fit receiver
   // assumptions.  scoped_array<> might make more sense, if the size
@@ skipping 13 matching lines @@
 // Initializes the instance and registers the frame receiver.
 - (id)initWithFrameReceiver:(media::VideoCaptureDeviceMac*)frameReceiver;
 
 // Set the frame receiver.
 - (void)setFrameReceiver:(media::VideoCaptureDeviceMac*)frameReceiver;
 
 // Sets which capture device to use. Returns YES on sucess, NO otherwise.
 - (BOOL)setCaptureDevice:(NSString*)deviceId;
 
 // Configures the capture properties.
-- (BOOL)setCaptureHeight:(int)height width:(int)width frameRate:(int)frameRate;
+- (BOOL)setCaptureHeight:(int)height
+                   width:(int)width
+               frameRate:(float)frameRate;
 
 // Start video capturing. Returns YES on sucess, NO otherwise.
 - (BOOL)startCapture;
 
 // Stops video capturing.
 - (void)stopCapture;
 
 // Handle any QTCaptureSessionRuntimeErrorNotifications.
 - (void)handleNotification:(NSNotification*)errorNotification;
 
 @end
 
 #endif  // MEDIA_VIDEO_CAPTURE_MAC_VIDEO_CAPTURE_DEVICE_QTKIT_MAC_H_