cc: Remove ReflectedMainFrameState.

cc/trees/layer_tree_host_common.h

Index: cc/trees/layer_tree_host_common.h
diff --git a/cc/trees/layer_tree_host_common.h b/cc/trees/layer_tree_host_common.h
index 0b7034c2434c93c26e96d8b2a4d9b28b4cbaf261..cdf556969c0fa2b29e21f03540f0c356e679976f 100644
--- a/cc/trees/layer_tree_host_common.h
+++ b/cc/trees/layer_tree_host_common.h
@@ -161,21 +161,6 @@ class CC_EXPORT LayerTreeHostCommon {
   };
 };
 
-// A container for the state that was reported to the main thread during
-// BeginMainFrame, but could not be applied/resolved on the main thread.
-struct CC_EXPORT ReflectedMainFrameState {
-  struct ScrollUpdate {
-    int layer_id = Layer::LayerIdLabels::INVALID_ID;
-    gfx::Vector2dF scroll_delta;
-  };
-
-  ReflectedMainFrameState();
-  ~ReflectedMainFrameState();
-
-  std::vector<ScrollUpdate> scrolls;
-  float page_scale_delta;
-};
-
 struct CC_EXPORT ScrollAndScaleSet {
   ScrollAndScaleSet();
   ~ScrollAndScaleSet();