Remove DCHECK_IMPLIES and CHECK_IMPLIES

cc/playback/display_item_list.cc

 // Copyright 2014 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 "cc/playback/display_item_list.h"
 
 #include <string>
 
 #include "base/numerics/safe_conversions.h"
 #include "base/trace_event/trace_event.h"
@@ skipping 187 matching lines @@
   DCHECK(ProcessAppendedItemsCalled());
   return approximate_op_count_;
 }
 
 size_t DisplayItemList::PictureMemoryUsage() const {
   DCHECK(ProcessAppendedItemsCalled());
   // We double-count in this case. Produce zero to avoid being misleading.
   if (use_cached_picture_ && retain_individual_display_items_)
     return 0;
 
-  DCHECK_IMPLIES(use_cached_picture_, picture_);
+  DCHECK(!use_cached_picture_ || picture_);
   return picture_memory_usage_;
 }
 
 scoped_refptr<base::trace_event::ConvertableToTraceFormat>
 DisplayItemList::AsValue(bool include_items) const {
   DCHECK(ProcessAppendedItemsCalled());
   scoped_refptr<base::trace_event::TracedValue> state =
       new base::trace_event::TracedValue();
 
   if (include_items) {
@@ skipping 45 matching lines @@
     return;
 
   pixel_refs_->GatherPixelRefsFromPicture(picture_.get());
 }
 
 void* DisplayItemList::GetSidecar(DisplayItem* display_item) {
   return items_.GetSidecar(display_item);
 }
 
 }  // namespace cc