Merge ~santoshbit2007/oxide:overlay_scrollbar_color into oxide:master

[Santosh]

By default layer_tree_setting solid_color scrollbar color is white which is propogated to
Impl Tree and Impl tree draw solid color scrollbar as white

So I am overriding the the layer setting in oxide_content_renderer_client

[Chris Coulson (chrisccoulson)]

Thanks, please merge this (can you ensure that the changelog description references the bug number as well please. You can use the format LP: #1639241)

review: Approve

diff --git a/shared/renderer/oxide_content_renderer_client.cc b/shared/renderer/oxide_content_renderer_client.cc
index 8829392..934c19b 100644
--- a/shared/renderer/oxide_content_renderer_client.cc
+++ b/shared/renderer/oxide_content_renderer_client.cc
@@ -156,6 +156,7 @@ void ContentRendererClient::OverrideCompositorSettings(
     settings->scrollbar_fade_delay = base::TimeDelta::FromMilliseconds(300);
     settings->scrollbar_fade_resize_delay = base::TimeDelta::FromSeconds(2);
     settings->scrollbar_fade_duration = base::TimeDelta::FromMilliseconds(300);
+    settings->solid_color_scrollbar_color = SkColorSetARGB(128, 128, 128, 128);
   }
 }