Plumb smooth scrolling in Chromium compositor

android_webview/renderer/aw_render_view_ext.cc

Index: android_webview/renderer/aw_render_view_ext.cc
diff --git a/android_webview/renderer/aw_render_view_ext.cc b/android_webview/renderer/aw_render_view_ext.cc
index ac377253e24b3351b7f070fbfae5bff3e26ffbf6..88388d3f0c575932bd0e4e3cad311dbc84d8aa67 100644
--- a/android_webview/renderer/aw_render_view_ext.cc
+++ b/android_webview/renderer/aw_render_view_ext.cc
@@ -167,6 +167,7 @@ bool AwRenderViewExt::OnMessageReceived(const IPC::Message& message) {
                         OnResetScrollAndScaleState)
     IPC_MESSAGE_HANDLER(AwViewMsg_SetInitialPageScale, OnSetInitialPageScale)
     IPC_MESSAGE_HANDLER(AwViewMsg_SetBackgroundColor, OnSetBackgroundColor)
+    IPC_MESSAGE_HANDLER(AwViewMsg_SmoothScroll, OnSmoothScroll)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
@@ -320,4 +321,13 @@ void AwRenderViewExt::OnSetBackgroundColor(SkColor c) {
   render_view()->GetWebView()->setBaseBackgroundColor(c);
 }
 
+void AwRenderViewExt::OnSmoothScroll(int target_x,
+                                     int target_y,
+                                     long duration_ms) {
+  if (!render_view() || !render_view()->GetWebView())
+    return;
+
+  render_view()->GetWebView()->smoothScroll(target_x, target_y, duration_ms);
+}
+
 }  // namespace android_webview