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

chrome/browser/ui/autofill/chrome_autofill_client.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_AUTOFILL_CHROME_AUTOFILL_CLIENT_H_
 #define CHROME_BROWSER_UI_AUTOFILL_CHROME_AUTOFILL_CLIENT_H_
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/i18n/rtl.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "components/autofill/core/browser/autofill_client.h"
 #include "components/autofill/core/browser/ui/card_unmask_prompt_controller_impl.h"
-#include "components/zoom/zoom_observer.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_contents_user_data.h"
 
+#if !defined(OS_ANDROID)
+#include "components/zoom/zoom_observer.h"
+#endif  // !defined(OS_ANDROID)
+
 namespace content {
 class WebContents;
 }
 
 namespace autofill {
 
 class AutofillPopupControllerImpl;
 
 // Chrome implementation of AutofillClient.
 class ChromeAutofillClient
     : public AutofillClient,
       public content::WebContentsUserData<ChromeAutofillClient>,
-      public content::WebContentsObserver,
-      public zoom::ZoomObserver {
+      public content::WebContentsObserver
+#if !defined(OS_ANDROID)
+      ,
+      public zoom::ZoomObserver
+#endif  // !defined(OS_ANDROID)
+{
  public:
   ~ChromeAutofillClient() override;
 
   // AutofillClient:
   PersonalDataManager* GetPersonalDataManager() override;
   scoped_refptr<AutofillWebDataService> GetDatabase() override;
   PrefService* GetPrefs() override;
   syncer::SyncService* GetSyncService() override;
   IdentityProvider* GetIdentityProvider() override;
   rappor::RapporServiceImpl* GetRapporServiceImpl() override;
@@ skipping 34 matching lines @@
                              const base::string16& profile_full_name) override;
   bool IsContextSecure() override;
   bool ShouldShowSigninPromo() override;
   void StartSigninFlow() override;
   void ShowHttpNotSecureExplanation() override;
 
   // content::WebContentsObserver implementation.
   void MainFrameWasResized(bool width_changed) override;
   void WebContentsDestroyed() override;
 
+#if !defined(OS_ANDROID)
   // ZoomObserver implementation.
   void OnZoomChanged(
       const zoom::ZoomController::ZoomChangedEventData& data) override;
+#endif  // !defined(OS_ANDROID)
 
  private:
   explicit ChromeAutofillClient(content::WebContents* web_contents);
   friend class content::WebContentsUserData<ChromeAutofillClient>;
 
   base::WeakPtr<AutofillPopupControllerImpl> popup_controller_;
   CardUnmaskPromptControllerImpl unmask_controller_;
 
   // The identity provider, used for Payments integration.
   std::unique_ptr<IdentityProvider> identity_provider_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeAutofillClient);
 };
 
 }  // namespace autofill
 
 #endif  // CHROME_BROWSER_UI_AUTOFILL_CHROME_AUTOFILL_CLIENT_H_