[content shell] only allow test plugins to load during layout tests

content/shell/shell_plugin_service_filter.h

Index: content/shell/shell_plugin_service_filter.h
diff --git a/content/shell/shell_plugin_service_filter.h b/content/shell/shell_plugin_service_filter.h
new file mode 100644
index 0000000000000000000000000000000000000000..81f80636ca6b248bde3e7d51498105d96b73a904
--- /dev/null
+++ b/content/shell/shell_plugin_service_filter.h
@@ -0,0 +1,37 @@
+// Copyright (c) 2013 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.
+
+#ifndef CONTENT_SHELL_SHELL_PLUGIN_SERVICE_FILTER_H_
+#define CONTENT_SHELL_SHELL_PLUGIN_SERVICE_FILTER_H_
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "content/public/browser/plugin_service_filter.h"
+
+namespace content {
+
+class ShellPluginServiceFilter : public PluginServiceFilter {
+ public:
+  ShellPluginServiceFilter();
+  virtual ~ShellPluginServiceFilter();
+
+  // PluginServiceFilter implementation.
+  virtual bool IsPluginAvailable(int render_process_id,
+                                 int render_view_id,
+                                 const void* context,
+                                 const GURL& url,
+                                 const GURL& policy_url,
+                                 webkit::WebPluginInfo* plugin) OVERRIDE;
+
+  virtual bool CanLoadPlugin(int render_process_id,
+                             const base::FilePath& path) OVERRIDE;
+
+ private:
+
+  DISALLOW_COPY_AND_ASSIGN(ShellPluginServiceFilter);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_SHELL_SHELL_PLUGIN_SERVICE_FILTER_H_