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

third_party/WebKit/Source/core/css/CSSPageRuleTest.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/CSSPageRule.h"
 
 #include "core/css/CSSRuleList.h"
 #include "core/css/CSSTestHelper.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 12 matching lines @@
     if (CSSPageRule* pageRule = toCSSPageRule(helper.cssRules()->item(0)))
       EXPECT_EQ(":left", pageRule->selectorText());
   }
 }
 
 TEST(CSSPageRule, selectorText) {
   CSSTestHelper helper;
 
   const char* cssRule = "@page :left { size: auto; }";
   helper.addCSSRules(cssRule);
-  ASSERT(helper.cssRules());
+  DCHECK(helper.cssRules());
   EXPECT_EQ(1u, helper.cssRules()->length());
 
   CSSPageRule* pageRule = toCSSPageRule(helper.cssRules()->item(0));
   EXPECT_EQ(":left", pageRule->selectorText());
 
   // set invalid page selector.
   pageRule->setSelectorText(":hover");
   EXPECT_EQ(":left", pageRule->selectorText());
 
   // set invalid page selector.
   pageRule->setSelectorText("right { bla");
   EXPECT_EQ(":left", pageRule->selectorText());
 
   // set page pseudo class selector.
   pageRule->setSelectorText(":right");
   EXPECT_EQ(":right", pageRule->selectorText());
 
   // set page type selector.
   pageRule->setSelectorText("namedpage");
   EXPECT_EQ("namedpage", pageRule->selectorText());
 }
 
 }  // namespace blink