ImageCapture: introduce image_capture Blob to allow move-only semantics

media/capture/video/mac/video_capture_device_mac.mm

 // Copyright (c) 2012 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.
 
 #include "media/capture/video/mac/video_capture_device_mac.h"
 
 #include <IOKit/IOCFPlugIn.h>
 #include <IOKit/usb/IOUSBLib.h>
 #include <IOKit/usb/USBSpec.h>
 #include <stddef.h>
@@ skipping 426 matching lines @@
 
 void VideoCaptureDeviceMac::OnPhotoTaken(const uint8_t* image_data,
                                          size_t image_length,
                                          const std::string& mime_type) {
   DCHECK(photo_callback_);
   if (!image_data || !image_length) {
     OnPhotoError();
     return;
   }
 
-  photo_callback_->Run(
-      mime_type, std::vector<uint8_t>(image_data, image_data + image_length));
+  mojom::BlobPtr blob = mojom::Blob::New();
+  blob->data.assign(image_data, image_data + image_length);
+  blob->mime_type = mime_type;
+  photo_callback_->Run(std::move(blob));
   photo_callback_.reset();
 }
 
 void VideoCaptureDeviceMac::OnPhotoError() {
   DLOG(ERROR) << __FUNCTION__ << " error taking picture";
   photo_callback_.reset();
 }
 
 void VideoCaptureDeviceMac::ReceiveError(
     const tracked_objects::Location& from_here,
@@ skipping 21 matching lines @@
   if (![capture_device_ setCaptureHeight:capture_format_.frame_size.height()
                                    width:capture_format_.frame_size.width()
                                frameRate:capture_format_.frame_rate]) {
     ReceiveError(FROM_HERE, "Could not configure capture device.");
     return false;
   }
   return true;
 }
 
 }  // namespace media