RTC_[D]CHECK_op: Remove superfluous casts

webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc

Index: webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc
diff --git a/webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc b/webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc
index c045100abc00f514cbe542a48088c403ba164792..148140eccffc8e63d8de3c145a2c51f9549b4452 100644
--- a/webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc
+++ b/webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc
@@ -697,8 +697,8 @@ int VP8EncoderImpl::Encode(const VideoFrame& frame,
   // |raw_images_[0]|, the resolution of these frames must match. Note that
   // |input_image| might be scaled from |frame|. In that case, the resolution of
   // |raw_images_[0]| should have been updated in UpdateCodecFrameSize.
-  RTC_DCHECK_EQ(input_image->width(), static_cast<int>(raw_images_[0].d_w));
-  RTC_DCHECK_EQ(input_image->height(), static_cast<int>(raw_images_[0].d_h));
+  RTC_DCHECK_EQ(input_image->width(), raw_images_[0].d_w);
+  RTC_DCHECK_EQ(input_image->height(), raw_images_[0].d_h);
 
   // Image in vpx_image_t format.
   // Input image is const. VP8's raw image is not defined as const.