[Android]Increase Scrollbar fade delay on Resize.

cc/layers/layer_impl.cc

Index: cc/layers/layer_impl.cc
diff --git a/cc/layers/layer_impl.cc b/cc/layers/layer_impl.cc
index 29bdfe778fdf522fc9a3a8f97d74ef4adb90b71c..9638c9559107e6760abc8f72b9f07dc92199bcf0 100644
--- a/cc/layers/layer_impl.cc
+++ b/cc/layers/layer_impl.cc
@@ -782,7 +782,7 @@ void LayerImpl::SetBounds(const gfx::Size& bounds) {
 
   bounds_ = bounds;
 
-  ScrollbarParametersDidChange();
+  ScrollbarParametersDidChange(true);
   if (masks_to_bounds())
     NoteLayerPropertyChangedForSubtree();
   else
@@ -1226,7 +1226,8 @@ gfx::Vector2dF LayerImpl::ClampScrollToMaxScrollOffset() {
 }
 
 void LayerImpl::SetScrollbarPosition(ScrollbarLayerImplBase* scrollbar_layer,
-                                     LayerImpl* scrollbar_clip_layer) const {
+                                     LayerImpl* scrollbar_clip_layer,
+                                     bool on_resize) const {

[aelias_OOO_until_Jul13, 2014/09/30 18:55:27]

I don't think the new argument is needed here.  You can build on
https://codereview.chromium.org/571873003/ and use the longer delay if
SetMaximum or SetVisibleToTotalLengthRatio returns true.

[MuVen, 2014/10/01 16:45:51]

Done.

   DCHECK(scrollbar_layer);
   LayerImpl* page_scale_layer = layer_tree_impl()->page_scale_layer();
 
@@ -1311,7 +1312,7 @@ void LayerImpl::SetScrollbarPosition(ScrollbarLayerImplBase* scrollbar_layer,
             layer_tree_impl()->min_page_scale_factor()) ||
            !layer_tree_impl()->settings().use_pinch_zoom_scrollbars);
       if (is_animatable_scrollbar)
-        scrollbar_animation_controller_->DidScrollUpdate();
+        scrollbar_animation_controller_->DidScrollUpdate(on_resize);
     }
   }
 }
@@ -1374,14 +1375,14 @@ bool LayerImpl::HasScrollbar(ScrollbarOrientation orientation) const {
   return false;
 }
 
-void LayerImpl::ScrollbarParametersDidChange() {
+void LayerImpl::ScrollbarParametersDidChange(bool on_resize) {
   if (!scrollbars_)
     return;
 
   for (ScrollbarSet::iterator it = scrollbars_->begin();
        it != scrollbars_->end();
        ++it)
-    (*it)->ScrollbarParametersDidChange();
+    (*it)->ScrollbarParametersDidChange(on_resize);
 }
 
 void LayerImpl::SetNeedsPushProperties() {