Move the user agent styles sheets to blink_resources.grd (Part 3)

Source/platform/PlatformResourceLoader.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 "config.h"
 #include "PlatformResourceLoader.h"
 
 #include "public/platform/Platform.h"
 #include "public/platform/WebData.h"
 
 namespace blink {
 
 String loadResourceAsASCIIString(const char* resource)
 {
     const WebData& resourceData = Platform::current()->loadResource(resource);
     String dataString(resourceData.data(), resourceData.size());
-    ASSERT(!dataString.isEmpty() && dataString.containsOnlyASCII());
+    RELEASE_ASSERT(!dataString.isEmpty() && dataString.containsOnlyASCII());
     return dataString;
 }
 
 } // namespace blink