The chrome browser target should not depend on plugins.

webkit/common/plugins/ppapi/ppapi_utils.h

+// 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 WEBKIT_COMMON_PLUGINS_PPAPI_PPAPI_UTILS_H_
+#define WEBKIT_COMMON_PLUGINS_PPAPI_PPAPI_UTILS_H_
+
+namespace webkit {
+namespace ppapi {
+
+// Returns true if the interface name passed in is supported by the
+// browser.
+bool IsSupportedPepperInterface(const char* name);
+
+}  // namespace ppapi
+}  // namespace webkit
+
+#endif  // WEBKIT_COMMON_PLUGINS_PPAPI_PPAPI_UTILS_H_
+
+