Replace ASSERT, ASSERT_NOT_REACHED, and RELEASE_ASSERT in core/css/

third_party/WebKit/Source/core/css/CSSPaintImageGenerator.cpp

 // Copyright 2016 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 "core/css/CSSPaintImageGenerator.h"
 
 namespace blink {
 
 namespace {
 
 CSSPaintImageGenerator::CSSPaintImageGeneratorCreateFunction s_createFunction =
     nullptr;
 
 }  // namespace
 
 // static
 void CSSPaintImageGenerator::init(
     CSSPaintImageGeneratorCreateFunction createFunction) {
-  ASSERT(!s_createFunction);
+  DCHECK(!s_createFunction);
   s_createFunction = createFunction;
 }
 
 // static
 CSSPaintImageGenerator* CSSPaintImageGenerator::create(const String& name,
                                                        Document& document,
                                                        Observer* observer) {
-  ASSERT(s_createFunction);
+  DCHECK(s_createFunction);
   return s_createFunction(name, document, observer);
 }
 
 CSSPaintImageGenerator::~CSSPaintImageGenerator() {}
 
 }  // namespace blink