Use ExpandToParagraphBoundary in SpellChecker::FindFirstMisspelling

third_party/WebKit/Source/core/editing/spellcheck/SpellCheckerTest.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/editing/spellcheck/SpellChecker.h"
 
 #include "core/editing/Editor.h"
 #include "core/editing/spellcheck/SpellCheckTestBase.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/LocalFrameView.h"
@@ skipping 37 matching lines @@
       "</td></tr></table>"
       "zz zz zz"
       "</div>");
   GetDocument().QuerySelector("div")->focus();
   UpdateAllLifecyclePhases();
 
   // Do not crash in advanceToNextMisspelling.
   GetDocument().GetFrame()->GetSpellChecker().AdvanceToNextMisspelling(false);
 }
 
+// Regression test for crbug.com/728801
+TEST_F(SpellCheckerTest, AdvancedToNextMisspellingWrapSearchNoCrash) {
+  SetBodyContent("<div contenteditable>  zz zz zz  </div>");
+
+  Element* div = GetDocument().QuerySelector("div");
+  div->focus();
+  Selection().SetSelection(SelectionInDOMTree::Builder()
+                               .Collapse(Position::LastPositionInNode(div))
+                               .Build());
+  UpdateAllLifecyclePhases();
+
+  // TODO(xiaochengh): We should have SpellCheckTestBase::GetSpellChecker().
+  GetFrame().GetSpellChecker().AdvanceToNextMisspelling(false);
+}
+
 TEST_F(SpellCheckerTest, SpellCheckDoesNotCauseUpdateLayout) {
   SetBodyContent("<input>");
   HTMLInputElement* input =
       toHTMLInputElement(GetDocument().QuerySelector("input"));
   input->focus();
   input->setValue("Hello, input field");
   GetDocument().UpdateStyleAndLayout();
   VisibleSelection old_selection =
       GetDocument()
           .GetFrame()
           ->Selection()
           .ComputeVisibleSelectionInDOMTreeDeprecated();
 
   Position new_position(input->InnerEditorElement()->firstChild(), 3);
   GetDocument().GetFrame()->Selection().SetSelection(
       SelectionInDOMTree::Builder().Collapse(new_position).Build());
   ASSERT_EQ(3u, input->selectionStart());
 
   EXPECT_TRUE(GetFrame().GetSpellChecker().IsSpellCheckingEnabled());
   ForceLayout();
   int start_count = LayoutCount();
   GetFrame().GetSpellChecker().RespondToChangedSelection(
       old_selection.Start(),
       FrameSelection::kCloseTyping | FrameSelection::kClearTypingStyle);
   EXPECT_EQ(start_count, LayoutCount());
 }
 
 }  // namespace blink