Revert of Avoid style clobbering in setCompositionFromExistingText.

Source/web/WebViewImpl.cpp

Index: Source/web/WebViewImpl.cpp
diff --git a/Source/web/WebViewImpl.cpp b/Source/web/WebViewImpl.cpp
index f6afffcb4c0b85839401cf100ad3278375c2bf6a..c1d869d5578d8902a442cab24cdaafa24c1b1728 100644
--- a/Source/web/WebViewImpl.cpp
+++ b/Source/web/WebViewImpl.cpp
@@ -2584,6 +2584,20 @@
     return toLocalFrame(frame)->selection().selection().isBaseFirst();
 }
 
+WebVector<WebCompositionUnderline> WebViewImpl::compositionUnderlines() const
+{
+    const LocalFrame* focused = toLocalFrame(focusedCoreFrame());
+    if (!focused)
+        return WebVector<WebCompositionUnderline>();
+    const Vector<CompositionUnderline>& underlines = focused->inputMethodController().customCompositionUnderlines();
+    WebVector<WebCompositionUnderline> results(underlines.size());
+    for (size_t index = 0; index < underlines.size(); ++index) {
+        CompositionUnderline underline = underlines[index];
+        results[index] = WebCompositionUnderline(underline.startOffset, underline.endOffset, static_cast<WebColor>(underline.color.rgb()), underline.thick, static_cast<WebColor>(underline.backgroundColor.rgb()));
+    }
+    return results;
+}
+
 WebColor WebViewImpl::backgroundColor() const
 {
     if (isTransparent())