RELEASE_ASSERT -> CHECK and ASSERT -> DCHECK in web.

third_party/WebKit/Source/web/tests/WebDocumentTest.cpp

 // 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 "public/web/WebDocument.h"
 
 #include "core/CSSPropertyNames.h"
 #include "core/HTMLNames.h"
 #include "core/dom/NodeComputedStyle.h"
 #include "core/dom/StyleEngine.h"
@@ skipping 58 matching lines @@
 
     unsigned startCount = coreDoc->styleEngine().styleForElementCount();
 
     webDoc.insertStyleSheet("body { color: green }");
 
     // Check insertStyleSheet did not cause a synchronous style recalc.
     unsigned elementCount = coreDoc->styleEngine().styleForElementCount() - startCount;
     ASSERT_EQ(0U, elementCount);
 
     HTMLElement* bodyElement = coreDoc->body();
-    ASSERT(bodyElement);
+    DCHECK(bodyElement);
 
     const ComputedStyle& styleBeforeInsertion = bodyElement->computedStyleRef();
 
     // Inserted stylesheet not yet applied.
     ASSERT_EQ(Color(0, 0, 0), styleBeforeInsertion.visitedDependentColor(CSSPropertyColor));
 
     // Apply inserted stylesheet.
     coreDoc->updateLayoutTree();
 
     const ComputedStyle& styleAfterInsertion = bodyElement->computedStyleRef();
@@ skipping 230 matching lines @@
     load(nestedOriginAInOriginB);
 
     SchemeRegistry::registerURLSchemeAsFirstPartyWhenTopLevel("http");
 
     ASSERT_EQ(toOriginA(nestedOriginAInOriginB), topDocument()->firstPartyForCookies());
     ASSERT_EQ(toOriginA(nestedOriginAInOriginB), nestedDocument()->firstPartyForCookies());
     ASSERT_EQ(toOriginA(nestedOriginAInOriginB), nestedNestedDocument()->firstPartyForCookies());
 }
 
 } // namespace blink