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

media/video/capture/video_capture_types.h

Index: media/video/capture/video_capture_types.h
diff --git a/media/video/capture/video_capture_types.h b/media/video/capture/video_capture_types.h
index f8e8cab9ebaa4ed48aee99fd319333249d8a2354..3869876260abaf77a68b428a82d45ae478ee69e0 100644
--- a/media/video/capture/video_capture_types.h
+++ b/media/video/capture/video_capture_types.h
@@ -67,6 +67,10 @@ class MEDIA_EXPORT VideoCaptureFormat {
   std::string ToString() const;
   static std::string PixelFormatToString(VideoPixelFormat format);
 
+  // Returns the required buffer size to hold an image of a given
+  // VideoCaptureFormat with no padding and tightly packed.
+  size_t ImageAllocationSize() const;
+
   // Checks that all values are in the expected range. All limits are specified
   // in media::Limits.
   bool IsValid() const;