Reland:Refactored pixel format resize operations in media/video/capture into a function called Vide…

content/browser/renderer_host/media/video_capture_controller.cc

Index: content/browser/renderer_host/media/video_capture_controller.cc
diff --git a/content/browser/renderer_host/media/video_capture_controller.cc b/content/browser/renderer_host/media/video_capture_controller.cc
index 8ff97bdf767d93c8821ef401ec33b229dfc31348..cbc66d2d9e654b30ba48cacc8bdf78ce9546b463 100644
--- a/content/browser/renderer_host/media/video_capture_controller.cc
+++ b/content/browser/renderer_host/media/video_capture_controller.cc
@@ -469,6 +469,10 @@ void VideoCaptureController::VideoCaptureDeviceClient::OnIncomingCapturedData(
       NOTREACHED();
   }
 
+  // The input |length| can be greater than the required buffer size because of
+  // paddings and/or alignments, but it cannot be less.
+  DCHECK_GE(static_cast<size_t>(length), frame_format.ImageAllocationSize());
+
   if (libyuv::ConvertToI420(data,
                             length,
                             yplane,