Respect user_scrollable disabling in pinch-virtual-viewport mode.

cc/layers/layer_impl.h

Index: cc/layers/layer_impl.h
diff --git a/cc/layers/layer_impl.h b/cc/layers/layer_impl.h
index 54dda06fc2d417d2b8e5503f899c5f98cb1a37dd..401fdceed39fd36420deb294c9b7d973b37a3748 100644
--- a/cc/layers/layer_impl.h
+++ b/cc/layers/layer_impl.h
@@ -407,9 +407,13 @@ class CC_EXPORT LayerImpl : public LayerAnimationValueObserver,
   void set_user_scrollable_horizontal(bool scrollable) {
     user_scrollable_horizontal_ = scrollable;
   }
+  bool user_scrollable_horizontal() const {
+    return user_scrollable_horizontal_;
+  }
   void set_user_scrollable_vertical(bool scrollable) {
     user_scrollable_vertical_ = scrollable;
   }
+  bool user_scrollable_vertical() const { return user_scrollable_vertical_; }
 
   void ApplySentScrollDeltasFromAbortedCommit();
   void ApplyScrollDeltasSinceBeginMainFrame();