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

chrome/renderer/chrome_content_renderer_client.h

Index: chrome/renderer/chrome_content_renderer_client.h
diff --git a/chrome/renderer/chrome_content_renderer_client.h b/chrome/renderer/chrome_content_renderer_client.h
index c5590c024b672ac2eb0792b0619ca217e4e277b3..9c3ac3adfc3111600e50219c2c3d16c6230b6c32 100644
--- a/chrome/renderer/chrome_content_renderer_client.h
+++ b/chrome/renderer/chrome_content_renderer_client.h
@@ -191,6 +191,7 @@ class ChromeContentRendererClient : public content::ContentRendererClient {
   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,
@@ -198,6 +199,7 @@ class ChromeContentRendererClient : public content::ContentRendererClient {
                             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_;