Don't ever split DocumentMarkers on remove

third_party/WebKit/Source/core/editing/InputMethodControllerTest.cpp

 // Copyright 2014 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/InputMethodController.h"
 
 #include <memory>
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/dom/Range.h"
@@ skipping 1852 matching lines @@
   EphemeralRange markerRange = PlainTextRange(5, 10).createRange(*div);
   document().markers().addMarker(markerRange.startPosition(),
                                  markerRange.endPosition(),
                                  DocumentMarker::TextMatch);
 
   // Delete middle of marker
   Vector<CompositionUnderline> emptyUnderlines;
   controller().setCompositionFromExistingText(emptyUnderlines, 6, 9);
   controller().commitText(String(""), emptyUnderlines, 0);
 
-  EXPECT_EQ(2u, document().markers().markers().size());
+  EXPECT_EQ(1u, document().markers().markers().size());
 
   EXPECT_EQ(5u, document().markers().markers()[0]->startOffset());
-  EXPECT_EQ(6u, document().markers().markers()[0]->endOffset());
-  EXPECT_EQ(6u, document().markers().markers()[1]->startOffset());
-  EXPECT_EQ(7u, document().markers().markers()[1]->endOffset());
+  EXPECT_EQ(7u, document().markers().markers()[0]->endOffset());
 }
 
 TEST_F(InputMethodControllerTest, Marker_InsertInMarkerInterior) {
   Element* div = insertHTMLElement(
       "<div id='sample' contenteditable>1111122222333334444455555</div>",
       "sample");
 
   EphemeralRange markerRange = PlainTextRange(0, 5).createRange(*div);
   document().markers().addMarker(markerRange.startPosition(),
                                  markerRange.endPosition(),
@@ skipping 60 matching lines @@
   EXPECT_EQ(5u, document().markers().markers()[0]->endOffset());
 
   EXPECT_EQ(10u, document().markers().markers()[1]->startOffset());
   EXPECT_EQ(20u, document().markers().markers()[1]->endOffset());
 
   EXPECT_EQ(20u, document().markers().markers()[2]->startOffset());
   EXPECT_EQ(25u, document().markers().markers()[2]->endOffset());
 }
 
 }  // namespace blink