Adding the android specific platorm_util file.

chrome/browser/platform_util_android.cc

+// Copyright (c) 2012 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 "base/logging.h"
+#include "chrome/browser/platform_util.h"
+
+namespace platform_util {
+
+// TODO: crbug/115682 to track implementation of the following methods.
+
+void ShowItemInFolder(const FilePath& full_path) {
+  NOTIMPLEMENTED();
+}
+
+void OpenItem(const FilePath& full_path) {
+  NOTIMPLEMENTED();
+}
+
+void OpenExternal(const GURL& url) {
+  NOTIMPLEMENTED();
+}
+
+gfx::NativeWindow GetTopLevel(gfx::NativeView view) {
+  NOTIMPLEMENTED();
+  return view;
+}
+
+gfx::NativeView GetParent(gfx::NativeView view) {
+  NOTIMPLEMENTED();
+  return view;
+}
+
+bool IsWindowActive(gfx::NativeWindow window) {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+void ActivateWindow(gfx::NativeWindow window) {
+  NOTIMPLEMENTED();
+}
+
+bool IsVisible(gfx::NativeView view) {
+  NOTIMPLEMENTED();
+  return true;
+}
+
+} // namespace platform_util
+