Passing BackgroundColorSpan and UnderlineSpan from Clank to Blink.

content/browser/renderer_host/render_widget_host_view_aura.cc

Index: content/browser/renderer_host/render_widget_host_view_aura.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.cc b/content/browser/renderer_host/render_widget_host_view_aura.cc
index 1cf441232b2ba7d02efefbec88681730eeb51d22..c7e4f08cebd306ee2a9c5d48e45e7843c6fcf330 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.cc
+++ b/content/browser/renderer_host/render_widget_host_view_aura.cc
@@ -1347,10 +1347,12 @@ void RenderWidgetHostViewAura::SetCompositionText(
   for (std::vector<ui::CompositionUnderline>::const_iterator it =
            composition.underlines.begin();
        it != composition.underlines.end(); ++it) {
-    underlines.push_back(blink::WebCompositionUnderline(it->start_offset,
-                                                        it->end_offset,
-                                                        it->color,
-                                                        it->thick));
+    underlines.push_back(
+        blink::WebCompositionUnderline(static_cast<unsigned>(it->start_offset),
+                                       static_cast<unsigned>(it->end_offset),
+                                       it->color,
+                                       it->thick,
+                                       it->background_color));
   }
 
   // TODO(suzhe): due to a bug of webkit, we can't use selection range with