Passing BackgroundColorSpan and UnderlineSpan from Clank to Blink.

ui/base/ime/composition_text_util_pango.cc

Index: ui/base/ime/composition_text_util_pango.cc
diff --git a/ui/base/ime/composition_text_util_pango.cc b/ui/base/ime/composition_text_util_pango.cc
index 98dadb6cc407cad8042833ffd472caa0c1790e45..325cdd61d924f630e01c708d42ff395faddb77c2 100644
--- a/ui/base/ime/composition_text_util_pango.cc
+++ b/ui/base/ime/composition_text_util_pango.cc
@@ -75,8 +75,11 @@ void ExtractCompositionTextFromGtkPreedit(const gchar* utf8_text,
 
       if (background_attr || underline_attr) {
         // Use a black thin underline by default.
-        CompositionUnderline underline(
-            char16_offsets[start], char16_offsets[end], SK_ColorBLACK, false);
+        CompositionUnderline underline(char16_offsets[start],
+                                       char16_offsets[end],
+                                       SK_ColorBLACK,
+                                       false,
+                                       SK_ColorTRANSPARENT);
 
         // Always use thick underline for a range with background color, which
         // is usually the selection range.
@@ -108,8 +111,8 @@ void ExtractCompositionTextFromGtkPreedit(const gchar* utf8_text,
 
   // Use a black thin underline by default.
   if (composition->underlines.empty()) {
-    composition->underlines.push_back(
-        CompositionUnderline(0, length, SK_ColorBLACK, false));
+    composition->underlines.push_back(CompositionUnderline(
+        0, length, SK_ColorBLACK, false, SK_ColorTRANSPARENT));
   }
 }