Don't compile code for desktop zoom or GuestViews on mobile platforms.

chromecast/browser/cast_browser_context.cc

 // Copyright 2014 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 "chromecast/browser/cast_browser_context.h"
 
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/macros.h"
 #include "base/path_service.h"
@@ skipping 63 matching lines @@
 #else
   // Chromecast doesn't support user profiles nor does it have
   // incognito mode.  This means that all of the persistent
   // data (currently only cookies and local storage) will be
   // shared in a single location as defined here.
   CHECK(PathService::Get(DIR_CAST_HOME, &path_));
 #endif  // defined(OS_ANDROID)
   BrowserContext::Initialize(this, path_);
 }
 
+#if !defined(OS_ANDROID)
 std::unique_ptr<content::ZoomLevelDelegate>
 CastBrowserContext::CreateZoomLevelDelegate(
     const base::FilePath& partition_path) {
   return nullptr;
 }
+#endif  // !defined(OS_ANDROID)
 
 base::FilePath CastBrowserContext::GetPath() const {
   return path_;
 }
 
 bool CastBrowserContext::IsOffTheRecord() const {
   return false;
 }
 
 net::URLRequestContextGetter* CastBrowserContext::GetSystemRequestContext() {
@@ skipping 57 matching lines @@
 }
 
 net::URLRequestContextGetter*
 CastBrowserContext::CreateMediaRequestContextForStoragePartition(
     const base::FilePath& partition_path, bool in_memory) {
   return nullptr;
 }
 
 }  // namespace shell
 }  // namespace chromecast