Merge 163727 - [Chromoting] Change ScreenRefresh to use 'if' instead of 'DCHECK'.

remoting/host/video_frame_capturer_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 "remoting/host/video_frame_capturer.h"
 
 #include <ApplicationServices/ApplicationServices.h>
 #include <Cocoa/Cocoa.h>
 #include <dlfcn.h>
 #include <IOKit/pwr_mgt/IOPMLib.h>
@@ skipping 729 matching lines @@
   (*cgl_set_full_screen_)(cgl_context_);
   CGLSetCurrentContext(cgl_context_);
 
   size_t buffer_size = desktop_bounds_.width() * desktop_bounds_.height() *
                        sizeof(uint32_t);
   pixel_buffer_object_.Init(cgl_context_, buffer_size);
 }
 
 void VideoFrameCapturerMac::ScreenRefresh(CGRectCount count,
                                           const CGRect* rect_array) {
-  DCHECK(!desktop_bounds_.isEmpty());
+  if (desktop_bounds_.isEmpty()) {
+    return;
+  }
   SkIRect skirect_array[count];
   for (CGRectCount i = 0; i < count; ++i) {
     skirect_array[i] = CGRectToSkIRect(rect_array[i]);
     skirect_array[i].offset(-desktop_bounds_.left(), -desktop_bounds_.top());
   }
   SkRegion region;
   region.setRects(skirect_array, count);
   InvalidateRegion(region);
 }
 
@@ skipping 67 matching lines @@
 VideoFrameCapturer* VideoFrameCapturer::Create() {
   VideoFrameCapturerMac* capturer = new VideoFrameCapturerMac();
   if (!capturer->Init()) {
     delete capturer;
     capturer = NULL;
   }
   return capturer;
 }
 
 }  // namespace remoting