Index: cc/trees/layer_tree_host_impl.h |
diff --git a/cc/trees/layer_tree_host_impl.h b/cc/trees/layer_tree_host_impl.h |
index f02a36c93d9f84b42c6df08717ce4986ccd47332..cdfcdab72acf07a235664db3eafcc88c74116d3b 100644 |
--- a/cc/trees/layer_tree_host_impl.h |
+++ b/cc/trees/layer_tree_host_impl.h |
@@ -707,6 +707,14 @@ class CC_EXPORT LayerTreeHostImpl |
void ImageDecodeFinished(const base::Callback<void(bool)>& embedder_callback, |
bool decode_succeeded); |
+ // This function keeps track of sources of scrolls that are handled in the |
+ // compositor side. The information gets shared by the main thread as part of |
+ // the begin_main_frame_state. Finally Use counters are updated in the main |
+ // thread side to keep track of the frequency of scrolling with different |
+ // sources per page load. TODO(crbug.com/691886): Use GRC API to plumb the |
+ // scroll source info for Use Counters. |
+ void UpdateScrollSourceInfo(bool is_wheel_scroll); |
+ |
using UIResourceMap = std::unordered_map<UIResourceId, UIResourceData>; |
UIResourceMap ui_resource_map_; |
@@ -853,6 +861,11 @@ class CC_EXPORT LayerTreeHostImpl |
// begin main frame. These callbacks must only be called on the main thread. |
std::vector<base::Closure> completed_image_decode_callbacks_; |
+ // These are used to transfer usage of touch and wheel scrolls to the main |
+ // thread. |
+ bool has_scrolled_by_wheel_; |
+ bool has_scrolled_by_touch_; |
+ |
DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl); |
}; |