Revert of Remove DCHECK_IMPLIES/CHECK_IMPLIES.

ui/gl/gl_image_memory.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 "ui/gl/gl_image_memory.h"
 
 #include "base/logging.h"
 #include "base/trace_event/trace_event.h"
 #include "ui/gfx/buffer_format_util.h"
 #include "ui/gl/gl_bindings.h"
@@ skipping 240 matching lines @@
     return false;
   }
 
   if (!ValidFormat(format)) {
     LOG(ERROR) << "Invalid format: " << static_cast<int>(format);
     return false;
   }
 
   DCHECK(memory);
   DCHECK(!memory_);
-  DCHECK(!IsCompressedFormat(format) || size_.width() % 4 == 0);
-  DCHECK(!IsCompressedFormat(format) || size_.height() % 4 == 0);
+  DCHECK_IMPLIES(IsCompressedFormat(format), size_.width() % 4 == 0);
+  DCHECK_IMPLIES(IsCompressedFormat(format), size_.height() % 4 == 0);
   memory_ = memory;
   format_ = format;
   return true;
 }
 
 void GLImageMemory::Destroy(bool have_context) {
   memory_ = nullptr;
 }
 
 Size GLImageMemory::GetSize() {
@@ skipping 89 matching lines @@
   return false;
 }
 
 // static
 unsigned GLImageMemory::GetInternalFormatForTesting(BufferFormat format) {
   DCHECK(ValidFormat(format));
   return TextureFormat(format);
 }
 
 }  // namespace gfx