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 bae4d44e7d97c4770e58524218d43ad2255e68e9..98da42f867cd95af77db675853810397d42597ca 100644
--- a/content/browser/renderer_host/media/video_capture_controller.cc
+++ b/content/browser/renderer_host/media/video_capture_controller.cc
@@ -495,6 +495,10 @@ 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,