lockOrientation() fallback when the callback one isn't implemented.

public/platform/Platform.h

Index: public/platform/Platform.h
diff --git a/public/platform/Platform.h b/public/platform/Platform.h
index 8719bbd054a1fe29065cd74af81621532a6a02a1..de277ac4f00ad928866f4ef2b49520afa39a3015 100644
--- a/public/platform/Platform.h
+++ b/public/platform/Platform.h
@@ -639,8 +639,12 @@ public:
     // Request a screen orientation lock and pass a |callback| object to be used
     // to notify of success/failure. The |callback| parameter is expected to be
     // owned by the implementation.
-    virtual void lockOrientation(WebScreenOrientationLockType, WebLockOrientationCallback* callback)
+    virtual void lockOrientation(WebScreenOrientationLockType orientation, WebLockOrientationCallback* callback)
     {
+        // FIXME: remove this when
+        // lockOrientation(orientation, callback) will be handled in Chromium.
+        lockOrientation(orientation);
+
         delete callback; // prevents memory leak if there is no implementation.
     }
     virtual void unlockOrientation() { }