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

chrome/browser/ui/browser.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 CHROME_BROWSER_UI_BROWSER_H_
 #define CHROME_BROWSER_UI_BROWSER_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 18 matching lines @@
 #include "chrome/browser/ui/exclusive_access/exclusive_access_manager.h"
 #include "chrome/browser/ui/profile_chooser_constants.h"
 #include "chrome/browser/ui/tab_contents/core_tab_helper_delegate.h"
 #include "chrome/browser/ui/tabs/tab_strip_model_observer.h"
 #include "components/content_settings/core/common/content_settings.h"
 #include "components/content_settings/core/common/content_settings_types.h"
 #include "components/prefs/pref_change_registrar.h"
 #include "components/sessions/core/session_id.h"
 #include "components/toolbar/toolbar_model.h"
 #include "components/translate/content/browser/content_translate_driver.h"
-#include "components/zoom/zoom_observer.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/page_navigator.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/common/page_zoom.h"
 #include "extensions/features/features.h"
 #include "ui/base/page_transition_types.h"
 #include "ui/base/ui_base_types.h"
 #include "ui/base/window_open_disposition.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/shell_dialogs/select_file_dialog.h"
 
 #if !defined(OS_CHROMEOS)
 #include "chrome/browser/ui/signin_view_controller.h"
 #endif
 
+#if !defined(OS_ANDROID)
+#include "components/zoom/zoom_observer.h"
+#endif  // !defined(OS_ANDROID)
+
 #if BUILDFLAG(ENABLE_EXTENSIONS)
 #include "extensions/browser/extension_registry_observer.h"
 #endif
 
 class BrowserContentSettingBubbleModelDelegate;
 class BrowserInstantController;
 class BrowserSyncedWindowDelegate;
 class BrowserToolbarModelDelegate;
 class BrowserLiveTabContext;
 class BrowserWindow;
@@ skipping 36 matching lines @@
 
 namespace web_modal {
 class WebContentsModalDialogHost;
 }
 
 class Browser : public TabStripModelObserver,
                 public content::WebContentsDelegate,
                 public CoreTabHelperDelegate,
                 public ChromeWebModalDialogManagerDelegate,
                 public BookmarkTabHelperDelegate,
+#if !defined(OS_ANDROID)
                 public zoom::ZoomObserver,
+#endif  // !defined(OS_ANDROID)
                 public content::PageNavigator,
                 public content::NotificationObserver,
 #if BUILDFLAG(ENABLE_EXTENSIONS)
                 public extensions::ExtensionRegistryObserver,
 #endif
                 public translate::ContentTranslateDriver::Observer,
                 public ui::SelectFileDialog::Listener {
  public:
   // SessionService::WindowType mirrors these values.  If you add to this
   // enum, look at SessionService::WindowType to see if it needs to be
@@ skipping 584 matching lines @@
   // Overridden from WebContentsModalDialogManagerDelegate:
   void SetWebContentsBlocked(content::WebContents* web_contents,
                              bool blocked) override;
   web_modal::WebContentsModalDialogHost* GetWebContentsModalDialogHost()
       override;
 
   // Overridden from BookmarkTabHelperDelegate:
   void URLStarredChanged(content::WebContents* web_contents,
                          bool starred) override;
 
+#if !defined(OS_ANDROID)
   // Overridden from ZoomObserver:
   void OnZoomChanged(
       const zoom::ZoomController::ZoomChangedEventData& data) override;
+#endif  // !defined(OS_ANDROID)
 
   // Overridden from SelectFileDialog::Listener:
   void FileSelected(const base::FilePath& path,
                     int index,
                     void* params) override;
   void FileSelectedWithExtraInfo(const ui::SelectedFileInfo& file_info,
                                  int index,
                                  void* params) override;
 
   // Overridden from content::NotificationObserver:
@@ skipping 278 matching lines @@
   // The following factory is used for chrome update coalescing.
   base::WeakPtrFactory<Browser> chrome_updater_factory_;
 
   // The following factory is used to close the frame at a later time.
   base::WeakPtrFactory<Browser> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Browser);
 };
 
 #endif  // CHROME_BROWSER_UI_BROWSER_H_