Revert of Avoid style clobbering in setCompositionFromExistingText.

Source/web/WebViewImpl.h

Index: Source/web/WebViewImpl.h
diff --git a/Source/web/WebViewImpl.h b/Source/web/WebViewImpl.h
index a9fffdd722dc3b00a6ce161249a774254041f9b4..98268d4dd0efa7f52f0a3b7260204f2f2c3a15b8 100644
--- a/Source/web/WebViewImpl.h
+++ b/Source/web/WebViewImpl.h
@@ -510,6 +510,9 @@
     // Returns the bounding box of the block type node touched by the WebPoint.
     WebRect computeBlockBound(const WebPoint&, bool ignoreClipping);
 
+    // Exposed for tests.
+    WebVector<WebCompositionUnderline> compositionUnderlines() const;
+
     WebLayerTreeView* layerTreeView() const { return m_layerTreeView; }
 
     bool matchesHeuristicsForGpuRasterizationForTesting() const { return m_matchesHeuristicsForGpuRasterization; }