Revert "[blink-in-js] Migrate resources required for blink-in-js to 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());
-    return dataString;
-}
-
-} // namespace blink