Avoid style clobbering in setCompositionFromExistingText. (2nd land)

Source/web/tests/WebViewTest.cpp

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
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@@ skipping 1026 matching lines @@
     std::string compositionText("yolo");
     webView->confirmComposition(WebString::fromUTF8(compositionText.c_str()));
     info = webView->textInputInfo();
     EXPECT_EQ("0123456789abcdefghijklmnopq\nrsyoloxyz", std::string(info.value.utf8().data()));
     EXPECT_EQ(34, info.selectionStart);
     EXPECT_EQ(34, info.selectionEnd);
     EXPECT_EQ(-1, info.compositionStart);
     EXPECT_EQ(-1, info.compositionEnd);
 }
 
+TEST_F(WebViewTest, SetCompositionFromExistingTextInRichText)
+{
+    URLTestHelpers::registerMockedURLFromBaseURL(WebString::fromUTF8(m_baseURL.c_str()), WebString::fromUTF8("content_editable_rich_text.html"));
+    WebView* webView = m_webViewHelper.initializeAndLoad(m_baseURL + "content_editable_rich_text.html");
+    webView->setInitialFocus(false);
+    WebVector<WebCompositionUnderline> underlines(static_cast<size_t>(1));
+    underlines[0] = WebCompositionUnderline(0, 4, 0, false, 0);
+    WebLocalFrameImpl* frame = toWebLocalFrameImpl(webView->mainFrame());
+    frame->setEditableSelectionOffsets(1, 1);
+    WebDocument document = webView->mainFrame()->document();
+    EXPECT_FALSE(document.getElementById("bold").isNull());
+    frame->setCompositionFromExistingText(0, 4, underlines);
+    EXPECT_FALSE(document.getElementById("bold").isNull());
+}
+
 TEST_F(WebViewTest, SetEditableSelectionOffsetsKeepsComposition)
 {
     URLTestHelpers::registerMockedURLFromBaseURL(WebString::fromUTF8(m_baseURL.c_str()), WebString::fromUTF8("input_field_populated.html"));
     WebView* webView = m_webViewHelper.initializeAndLoad(m_baseURL + "input_field_populated.html");
     webView->setInitialFocus(false);
 
     std::string compositionTextFirst("hello ");
     std::string compositionTextSecond("world");
     WebVector<WebCompositionUnderline> emptyUnderlines;
 
@@ skipping 1988 matching lines @@
     for (size_t i = 0; i < renders.size(); ++i) {
         double docStartTime = frame->domWindow()->document()->loader()->timing().monotonicTimeToZeroBasedDocumentTime(renderPairs[i].startTime) * 1000.0;
         ASSERT_DOUBLE_EQ(docStartTime, renders[i]->startTime());
         double docFinishTime = frame->domWindow()->document()->loader()->timing().monotonicTimeToZeroBasedDocumentTime(renderPairs[i].finishTime) * 1000.0;
         double docDuration = docFinishTime - docStartTime;
         ASSERT_DOUBLE_EQ(docDuration, renders[i]->duration());
     }
 }
 
 } // namespace blink