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

content/public/browser/browser_context.h

Index: content/public/browser/browser_context.h
diff --git a/content/public/browser/browser_context.h b/content/public/browser/browser_context.h
index f5cd8abf9a1557f7110706540df818efa97c268d..7a895f23a7d384d37d1264fd919f5026b0575946 100644
--- a/content/public/browser/browser_context.h
+++ b/content/public/browser/browser_context.h
@@ -18,13 +18,16 @@
 #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 {
@@ -191,10 +194,12 @@ class CONTENT_EXPORT BrowserContext : public base::SupportsUserData {
   // 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;