Android: Do not build any extensions code except for extensions_constants.

chrome/renderer/chrome_content_renderer_client.h

 // 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.
 
 #ifndef CHROME_RENDERER_CHROME_CONTENT_RENDERER_CLIENT_H_
 #define CHROME_RENDERER_CHROME_CONTENT_RENDERER_CLIENT_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 173 matching lines @@
   bool CrossesExtensionExtents(blink::WebFrame* frame,
                                const GURL& new_url,
                                const extensions::ExtensionSet& extensions,
                                bool is_extension_url,
                                bool is_initial_navigation);
 #endif
 
   static GURL GetNaClContentHandlerURL(const std::string& actual_mime_type,
                                        const content::WebPluginInfo& plugin);
 
+#if !defined(DISABLE_NACL)
   // Determines if a NaCl app is allowed, and modifies params to pass the app's
   // permissions to the trusted NaCl plugin.
   static bool IsNaClAllowed(const GURL& manifest_url,
                             const GURL& app_url,
                             bool is_nacl_unrestricted,
                             const extensions::Extension* extension,
                             blink::WebPluginParams* params);
+#endif
 
   scoped_ptr<ChromeRenderProcessObserver> chrome_observer_;
   scoped_ptr<web_cache::WebCacheRenderProcessObserver> web_cache_observer_;
 
 // TODO(thestig): Extract into a separate file if possible. Cleanup
 // ENABLE_EXTENSIONS ifdefs in the .cc file as well.
 #if defined(ENABLE_EXTENSIONS)
   scoped_ptr<ChromeExtensionsDispatcherDelegate> extension_dispatcher_delegate_;
   scoped_ptr<extensions::Dispatcher> extension_dispatcher_;
   scoped_ptr<extensions::RendererPermissionsPolicyDelegate>
@@ skipping 17 matching lines @@
 #if defined(ENABLE_FULL_PRINTING)
   scoped_ptr<ChromePDFPrintClient> pdf_print_client_;
 #endif
 #if defined(ENABLE_PLUGINS)
   std::set<std::string> allowed_compositor_origins_;
   std::set<std::string> allowed_video_decode_origins_;
 #endif
 };
 
 #endif  // CHROME_RENDERER_CHROME_CONTENT_RENDERER_CLIENT_H_