Add <meta viewport> support to the preloader

Source/core/html/parser/HTMLPreloadScannerTest.cpp

 // Copyright 2015 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 "core/html/parser/HTMLPreloadScanner.h"
 
 #include "core/MediaTypeNames.h"
 #include "core/css/MediaValuesCached.h"
 #include "core/html/parser/HTMLParserOptions.h"
@@ skipping 56 matching lines @@
         data.mediaType = MediaTypeNames::screen;
         data.strictMode = true;
         data.displayMode = WebDisplayModeBrowser;
         return MediaValuesCached::create(data);
     }
 
     virtual void SetUp()
     {
         HTMLParserOptions options(&m_dummyPageHolder->document());
         KURL documentURL(ParsedURLString, "http://whatever.test/");
-        m_scanner = HTMLPreloadScanner::create(options, documentURL, createMediaValues());
+        m_scanner = HTMLPreloadScanner::create(options, documentURL, CachedDocumentParameters::create(&m_dummyPageHolder->document(), createMediaValues()));
 
     }
 
     void test(TestCase testCase)
     {
         MockHTMLResourcePreloader preloader;
         KURL baseURL(ParsedURLString, testCase.baseURL);
         m_scanner->appendToEnd(String(testCase.inputHTML));
         m_scanner->scan(&preloader, baseURL);
 
         preloader.preloadRequestVerification(testCase.type, testCase.preloadedURL, testCase.outputBaseURL, testCase.resourceWidth);
     }
 
 private:
     OwnPtr<DummyPageHolder> m_dummyPageHolder;
     OwnPtr<HTMLPreloadScanner> m_scanner;
 };
 
 TEST_F(HTMLPreloadScannerTest, testImages)
 {
     TestCase testCases[] = {
         {"http://example.test", "<img src='bla.gif'>", "bla.gif", "http://example.test/", Resource::Image, 0},
+        {"http://example.test", "<img srcset='bla.gif 320w, blabla.gif 640w'>", "blabla.gif", "http://example.test/", Resource::Image, 0},
+        {"http://example.test", "<meta name=viewport content='width=160'><img srcset='bla.gif 320w, blabla.gif 640w'>", "bla.gif", "http://example.test/", Resource::Image, 0},
         {0, 0, 0, 0, Resource::Raw, 0} // Do not remove the terminator line.
     };
 
     for (unsigned i = 0; testCases[i].inputHTML; ++i) {
         TestCase testCase = testCases[i];
         test(testCase);
     }
 }
 
 }