Use stricter typing for NodeLists throughout the code base

Source/web/tests/TextFinderTest.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 "config.h"
 
 #include "web/TextFinder.h"
 
 #include "bindings/v8/ExceptionStatePlaceholder.h"
 #include "core/dom/Document.h"
+#include "core/dom/NodeList.h"
 #include "core/dom/Range.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/html/HTMLElement.h"
 #include "public/web/WebDocument.h"
 #include "web/FindInPageCoordinates.h"
 #include "web/WebLocalFrameImpl.h"
 #include "web/tests/FrameTestHelpers.h"
 #include "wtf/OwnPtr.h"
 #include <gtest/gtest.h>
 
@@ skipping 261 matching lines @@
     EXPECT_EQ(3, textFinder().totalMatchCount());
     WebVector<WebFloatRect> matchRects;
     textFinder().findMatchRects(matchRects);
     ASSERT_EQ(3u, matchRects.size());
     EXPECT_EQ(findInPageRect(textInUElement, 0, textInUElement, 3), matchRects[0]);
     EXPECT_EQ(findInPageRect(textInBElement, 0, textInBElement, 3), matchRects[1]);
     EXPECT_EQ(findInPageRect(textInIElement, 0, textInIElement, 3), matchRects[2]);
 }
 
 } // namespace