Pass through geofencing API calls to the content layer.

public/platform/Platform.h

Index: public/platform/Platform.h
diff --git a/public/platform/Platform.h b/public/platform/Platform.h
index 4d134682a7b54a4d73459985428b32b6cb390f3c..58f22e107dafe17c823a4a6c6ed475f4b7bb3ae8 100644
--- a/public/platform/Platform.h
+++ b/public/platform/Platform.h
@@ -74,6 +74,7 @@ class WebFallbackThemeEngine;
 class WebFileSystem;
 class WebFileUtilities;
 class WebFlingAnimator;
+class WebGeofencingProvider;
 class WebGestureCurveTarget;
 class WebGestureCurve;
 class WebGraphicsContext3DProvider;
@@ -631,6 +632,9 @@ public:
 
     virtual WebNotificationPresenter* notificationPresenter() { return 0; }
 
+    // Geofencing ---------------------------------------------------------
+
+    virtual WebGeofencingProvider* geofencingProvider() { return 0; }
 
 protected:
     virtual ~Platform() { }