Revert 147895 - switch mediaGalleries to .idl api definition

chrome/browser/extensions/api/media_gallery/media_gallery_apitest.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/command_line.h"
+#include "chrome/browser/extensions/extension_apitest.h"
+#include "chrome/common/chrome_switches.h"
+
+namespace {
+
+class ExperimentalExtensionApiTest : public ExtensionApiTest {
+ public:
+  virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
+    ExtensionApiTest::SetUpCommandLine(command_line);
+    command_line->AppendSwitch(switches::kEnableExperimentalExtensionApis);
+  }
+};
+
+}  // namespace
+
+IN_PROC_BROWSER_TEST_F(ExperimentalExtensionApiTest, MediaGallery) {
+  ASSERT_TRUE(RunExtensionTest("media_gallery")) << message_;
+}