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

content/shell/browser/shell_browser_context.h

Index: content/shell/browser/shell_browser_context.h
diff --git a/content/shell/browser/shell_browser_context.h b/content/shell/browser/shell_browser_context.h
index 3f2f502bf2c43c020407f8cbcb81a5cc0d420801..1e8b69b336eadd36b589323bf1f88df4a75fb566 100644
--- a/content/shell/browser/shell_browser_context.h
+++ b/content/shell/browser/shell_browser_context.h
@@ -27,7 +27,9 @@ class BackgroundSyncController;
 class DownloadManagerDelegate;
 class PermissionManager;
 class ShellDownloadManagerDelegate;
+#if !defined(OS_ANDROID)
 class ZoomLevelDelegate;
+#endif  // !defined(OS_ANDROID)
 
 class ShellBrowserContext : public BrowserContext {
  public:
@@ -41,8 +43,10 @@ class ShellBrowserContext : public BrowserContext {
 
   // 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;