Fixes for -Wunused-function on Linux, Android and ChromeOS

chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.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 "chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.h"
 
 #include <string>
 
 #include "base/base64.h"
 #include "base/logging.h"
@@ skipping 88 matching lines @@
                                                render_view_id);
   if (!rvh)
     return;
 
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_DOWNLOAD_INITIATED,
       content::Source<RenderViewHost>(rvh),
       content::NotificationService::NoDetails());
 }
 
+#if !defined(OS_ANDROID)
 // Goes through the extension's file browser handlers and checks if there is one
 // that can handle the |mime_type|.
 // |extension| must not be NULL.
 bool ExtensionCanHandleMimeType(const Extension* extension,
                                 const std::string& mime_type) {
   MimeTypesHandler* handler = MimeTypesHandler::GetHandler(extension);
   if (!handler)
     return false;
 
   return handler->CanHandleMIMEType(mime_type);
@@ skipping 23 matching lines @@
   Profile* profile = Profile::FromBrowserContext(browser_context);
   if (!profile)
     return;
 
   StreamsPrivateAPI* streams_private = StreamsPrivateAPI::Get(profile);
   if (!streams_private)
     return;
   streams_private->ExecuteMimeTypeHandler(
       extension_id, web_contents, stream.Pass(), expected_content_size);
 }
+#endif  // !defined(OS_ANDROID)
 
 enum PrerenderSchemeCancelReason {
   PRERENDER_SCHEME_CANCEL_REASON_EXTERNAL_PROTOCOL,
   PRERENDER_SCHEME_CANCEL_REASON_DATA,
   PRERENDER_SCHEME_CANCEL_REASON_BLOB,
   PRERENDER_SCHEME_CANCEL_REASON_FILE,
   PRERENDER_SCHEME_CANCEL_REASON_FILESYSTEM,
   PRERENDER_SCHEME_CANCEL_REASON_WEBSOCKET,
   PRERENDER_SCHEME_CANCEL_REASON_FTP,
   PRERENDER_SCHEME_CANCEL_REASON_CHROME,
@@ skipping 569 matching lines @@
   if (!prerender::PrerenderManager::DoesURLHaveValidScheme(redirect_url) &&
       ResourceRequestInfo::ForRequest(request)->GetAssociatedRenderView(
           &child_id, &route_id) &&
       prerender_tracker_->IsPrerenderingOnIOThread(child_id, route_id) &&
       prerender_tracker_->TryCancel(
           child_id, route_id, prerender::FINAL_STATUS_UNSUPPORTED_SCHEME)) {
     ReportUnsupportedPrerenderScheme(redirect_url);
     request->Cancel();
   }
 }