RTC_[D]CHECK_op: Remove "u" suffix on integer constants

webrtc/test/frame_generator.cc

 /*
  *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 #include "webrtc/test/frame_generator.h"
@@ skipping 143 matching lines @@
         start_time_(clock->TimeInMilliseconds()),
         scroll_time_(scroll_time_ms),
         pause_time_(pause_time_ms),
         num_frames_(files.size()),
         target_width_(static_cast<int>(target_width)),
         target_height_(static_cast<int>(target_height)),
         current_frame_num_(num_frames_ - 1),
         current_source_frame_(nullptr),
         file_generator_(files, source_width, source_height, 1) {
     RTC_DCHECK(clock_ != nullptr);
-    RTC_DCHECK_GT(num_frames_, 0u);
+    RTC_DCHECK_GT(num_frames_, 0);
     RTC_DCHECK_GE(source_height, target_height);
     RTC_DCHECK_GE(source_width, target_width);
     RTC_DCHECK_GE(scroll_time_ms, 0);
     RTC_DCHECK_GE(pause_time_ms, 0);
     RTC_DCHECK_GT(scroll_time_ms + pause_time_ms, 0);
   }
 
   virtual ~ScrollingImageFrameGenerator() {}
 
   VideoFrame* NextFrame() override {
@@ skipping 140 matching lines @@
     files.push_back(file);
   }
 
   return new ScrollingImageFrameGenerator(
       clock, files, source_width, source_height, target_width, target_height,
       scroll_time_ms, pause_time_ms);
 }
 
 }  // namespace test
 }  // namespace webrtc