Clang format of video_processing folder.

BUG=webrtc:5259

Review URL: https://codereview.webrtc.org/1508793002

Cr-Commit-Position: refs/heads/master@{#10925}
diff --git a/webrtc/modules/video_processing/include/video_processing.h b/webrtc/modules/video_processing/include/video_processing.h
index 36b693a..a8d6358 100644
--- a/webrtc/modules/video_processing/include/video_processing.h
+++ b/webrtc/modules/video_processing/include/video_processing.h
@@ -8,13 +8,6 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-/*
- * video_processing.h
- * This header file contains the API required for the video
- * processing module class.
- */
-
-
 #ifndef WEBRTC_MODULES_VIDEO_PROCESSING_INCLUDE_VIDEO_PROCESSING_H_
 #define WEBRTC_MODULES_VIDEO_PROCESSING_INCLUDE_VIDEO_PROCESSING_H_
 
@@ -43,11 +36,7 @@
     uint32_t sub_sampling_factor;  // Sub-sampling factor, in powers of 2.
   };
 
-  enum BrightnessWarning {
-    kNoWarning,
-    kDarkWarning,
-    kBrightWarning
-  };
+  enum BrightnessWarning { kNoWarning, kDarkWarning, kBrightWarning };
 
   static VideoProcessing* Create();
   virtual ~VideoProcessing() {}