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

android_webview/browser/aw_browser_context.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 ANDROID_WEBVIEW_BROWSER_AW_BROWSER_CONTEXT_H_
 #define ANDROID_WEBVIEW_BROWSER_AW_BROWSER_CONTEXT_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 69 matching lines @@
   void AddVisitedURLs(const std::vector<GURL>& urls);
 
   AwQuotaManagerBridge* GetQuotaManagerBridge();
   AwFormDatabaseService* GetFormDatabaseService();
   AwURLRequestContextGetter* GetAwURLRequestContext();
 
   policy::URLBlacklistManager* GetURLBlacklistManager();
   web_restrictions::WebRestrictionsClient* GetWebRestrictionProvider();
 
   // content::BrowserContext implementation.
-  std::unique_ptr<content::ZoomLevelDelegate> CreateZoomLevelDelegate(
-      const base::FilePath& partition_path) override;
   base::FilePath GetPath() const override;
   bool IsOffTheRecord() const override;
   content::ResourceContext* GetResourceContext() override;
   content::DownloadManagerDelegate* GetDownloadManagerDelegate() override;
   content::BrowserPluginGuestManager* GetGuestManager() override;
   storage::SpecialStoragePolicy* GetSpecialStoragePolicy() override;
   content::PushMessagingService* GetPushMessagingService() override;
   content::SSLHostStateDelegate* GetSSLHostStateDelegate() override;
   content::PermissionManager* GetPermissionManager() override;
   content::BackgroundSyncController* GetBackgroundSyncController() override;
@@ skipping 51 matching lines @@
   scoped_refptr<safe_browsing::RemoteSafeBrowsingDatabaseManager>
       safe_browsing_db_manager_;
   bool safe_browsing_db_manager_started_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(AwBrowserContext);
 };
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_BROWSER_AW_BROWSER_CONTEXT_H_