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

content/public/browser/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 CONTENT_PUBLIC_BROWSER_BROWSER_CONTEXT_H_
 #define CONTENT_PUBLIC_BROWSER_BROWSER_CONTEXT_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <map>
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "base/containers/hash_tables.h"
 #include "base/memory/linked_ptr.h"
 #include "base/supports_user_data.h"
 #include "content/common/content_export.h"
-#include "content/public/browser/zoom_level_delegate.h"
 #include "content/public/common/push_event_payload.h"
 #include "content/public/common/push_messaging_status.h"
 #include "content/public/common/service_info.h"
 #include "net/url_request/url_request_interceptor.h"
 #include "net/url_request/url_request_job_factory.h"
 
+#if !defined(OS_ANDROID)
+#include "content/public/browser/zoom_level_delegate.h"
+#endif
+
 class GURL;
 
 namespace base {
 class FilePath;
 class Time;
 }
 
 namespace service_manager {
 class Connector;
 }
@@ skipping 146 matching lines @@
 
   ~BrowserContext() override;
 
   // Shuts down the storage partitions associated to this browser context.
   // This must be called before the browser context is actually destroyed
   // and before a clean-up task for its corresponding IO thread residents (e.g.
   // ResourceContext) is posted, so that the classes that hung on
   // StoragePartition can have time to do necessary cleanups on IO thread.
   void ShutdownStoragePartitions();
 
+#if !defined(OS_ANDROID)
   // Creates a delegate to initialize a HostZoomMap and persist its information.
   // This is called during creation of each StoragePartition.
   virtual std::unique_ptr<ZoomLevelDelegate> CreateZoomLevelDelegate(
       const base::FilePath& partition_path) = 0;
+#endif
 
   // Returns the path of the directory where this context's data is stored.
   virtual base::FilePath GetPath() const = 0;
 
   // Return whether this context is incognito. Default is false.
   virtual bool IsOffTheRecord() const = 0;
 
   // Returns the resource context.
   virtual ResourceContext* GetResourceContext() = 0;
 
@@ skipping 68 matching lines @@
   // 2) The embedder saves its salt across restarts.
   static std::string CreateRandomMediaDeviceIDSalt();
 
  private:
   const std::string media_device_id_salt_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_BROWSER_CONTEXT_H_