Revert of Remove DCHECK_IMPLIES/CHECK_IMPLIES.

content/common/gpu/media/vp9_decoder.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/logging.h"
 #include "content/common/gpu/media/vp9_decoder.h"
 #include "media/base/limits.h"
 
 namespace content {
 
@@ skipping 120 matching lines @@
 
     if (!DecodeAndOutputPicture(pic)) {
       SetError();
       return kDecodeError;
     }
   }
 }
 
 void VP9Decoder::RefreshReferenceFrames(const scoped_refptr<VP9Picture>& pic) {
   for (size_t i = 0; i < media::kVp9NumRefFrames; ++i) {
-    DCHECK(!pic->frame_hdr->IsKeyframe() || pic->frame_hdr->RefreshFlag(i));
+    DCHECK_IMPLIES(pic->frame_hdr->IsKeyframe(),
+                   pic->frame_hdr->RefreshFlag(i));
     if (pic->frame_hdr->RefreshFlag(i))
       ref_frames_[i] = pic;
   }
 }
 
 bool VP9Decoder::DecodeAndOutputPicture(scoped_refptr<VP9Picture> pic) {
   DCHECK(!pic_size_.IsEmpty());
   DCHECK(pic->frame_hdr);
 
   if (!accelerator_->SubmitDecode(pic, parser_.GetSegmentation(),
@@ skipping 18 matching lines @@
   return pic_size_;
 }
 
 size_t VP9Decoder::GetRequiredNumOfPictures() const {
   // kMaxVideoFrames to keep higher level media pipeline populated, +2 for the
   // pictures being parsed and decoded currently.
   return media::limits::kMaxVideoFrames + media::kVp9NumRefFrames + 2;
 }
 
 }  // namespace content