Reland [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