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

content/shell/browser/shell_browser_context.h

 // Copyright 2013 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 CONTENT_SHELL_BROWSER_SHELL_BROWSER_CONTEXT_H_
 #define CONTENT_SHELL_BROWSER_SHELL_BROWSER_CONTEXT_H_
 
 #include <memory>
 
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/resource_context.h"
 #include "content/shell/browser/shell_url_request_context_getter.h"
 #include "net/url_request/url_request_job_factory.h"
 
 namespace net {
 class NetLog;
 }
 
 namespace content {
 
 class BackgroundSyncController;
 class DownloadManagerDelegate;
 class PermissionManager;
 class ShellDownloadManagerDelegate;
+#if !defined(OS_ANDROID)
 class ZoomLevelDelegate;
+#endif  // !defined(OS_ANDROID)
 
 class ShellBrowserContext : public BrowserContext {
  public:
   ShellBrowserContext(bool off_the_record, net::NetLog* net_log);
   ~ShellBrowserContext() override;
 
   void set_guest_manager_for_testing(
       BrowserPluginGuestManager* guest_manager) {
     guest_manager_ = guest_manager;
   }
 
   // BrowserContext implementation.
   base::FilePath GetPath() const override;
+#if !defined(OS_ANDROID)
   std::unique_ptr<ZoomLevelDelegate> CreateZoomLevelDelegate(
       const base::FilePath& partition_path) override;
+#endif  // !defined(OS_ANDROID)
   bool IsOffTheRecord() const override;
   DownloadManagerDelegate* GetDownloadManagerDelegate() override;
   ResourceContext* GetResourceContext() override;
   BrowserPluginGuestManager* GetGuestManager() override;
   storage::SpecialStoragePolicy* GetSpecialStoragePolicy() override;
   PushMessagingService* GetPushMessagingService() override;
   SSLHostStateDelegate* GetSSLHostStateDelegate() override;
   PermissionManager* GetPermissionManager() override;
   BackgroundSyncController* GetBackgroundSyncController() override;
   net::URLRequestContextGetter* CreateRequestContext(
@@ skipping 62 matching lines @@
   base::FilePath path_;
   BrowserPluginGuestManager* guest_manager_;
   scoped_refptr<ShellURLRequestContextGetter> url_request_getter_;
 
   DISALLOW_COPY_AND_ASSIGN(ShellBrowserContext);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_BROWSER_SHELL_BROWSER_CONTEXT_H_