Add <meta viewport> support to the preloader

Source/core/html/parser/HTMLPreloadScanner.h

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2010 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 10 matching lines @@
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef HTMLPreloadScanner_h
 #define HTMLPreloadScanner_h
 
 #include "core/css/MediaValues.h"
+#include "core/dom/ViewportDescription.h"
 #include "core/html/parser/CSSPreloadScanner.h"
 #include "core/html/parser/CompactHTMLToken.h"
 #include "core/html/parser/HTMLToken.h"
 #include "platform/text/SegmentedString.h"
+#include "wtf/RefCounted.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 typedef size_t TokenPreloadScannerCheckpoint;
 
 class HTMLParserOptions;
 class HTMLTokenizer;
 class SegmentedString;
 
+struct CachedDocumentParameters {
+    static PassOwnPtr<CachedDocumentParameters> create(Document* document, PassRefPtr<MediaValues> mediaValues)
+    {
+        return adoptPtr(new CachedDocumentParameters(document, mediaValues));
+    }
+
+    static PassOwnPtr<CachedDocumentParameters> create(Document* document)
+    {
+        return adoptPtr(new CachedDocumentParameters(document));
+    }
+
+    CachedDocumentParameters(Document*);
+    CachedDocumentParameters(Document*, PassRefPtr<MediaValues>);

[Nate Chapin, 2015/04/30 20:19:04]

Can we have two create() methods, but just one constructor? The bodies of these
constructors are pretty redundant.

+
+    RefPtr<MediaValues> mediaValues;
+    Length defaultViewportMinWidth;
+    bool viewportMetaZeroValuesQuirk;
+};
+
 class TokenPreloadScanner {
     WTF_MAKE_NONCOPYABLE(TokenPreloadScanner); WTF_MAKE_FAST_ALLOCATED(TokenPreloadScanner);
 public:
-    TokenPreloadScanner(const KURL& documentURL, PassRefPtr<MediaValues>);
+    TokenPreloadScanner(const KURL& documentURL, PassOwnPtr<CachedDocumentParameters>);
     ~TokenPreloadScanner();
 
     void scan(const HTMLToken&, const SegmentedString&, PreloadRequestStream& requests);
     void scan(const CompactHTMLToken&, const SegmentedString&, PreloadRequestStream& requests);
 
     void setPredictedBaseElementURL(const KURL& url) { m_predictedBaseElementURL = url; }
 
     // A TokenPreloadScannerCheckpoint is valid until the next call to rewindTo,
     // at which point all outstanding checkpoints are invalidated.
     TokenPreloadScannerCheckpoint createCheckpoint();
@@ skipping 33 matching lines @@
 
     CSSPreloadScanner m_cssScanner;
     const KURL m_documentURL;
     KURL m_predictedBaseElementURL;
     bool m_inStyle;
     bool m_inPicture;
     bool m_isAppCacheEnabled;
     bool m_isCSPEnabled;
     String m_pictureSourceURL;
     size_t m_templateCount;
-    RefPtr<MediaValues> m_mediaValues;
+    OwnPtr<CachedDocumentParameters> m_documentParameters;
 
     Vector<Checkpoint> m_checkpoints;
 };
 
 class HTMLPreloadScanner {
     WTF_MAKE_NONCOPYABLE(HTMLPreloadScanner); WTF_MAKE_FAST_ALLOCATED(HTMLPreloadScanner);
 public:
-    static PassOwnPtr<HTMLPreloadScanner> create(const HTMLParserOptions& options, const KURL& documentURL, PassRefPtr<MediaValues> mediaValues)
+    static PassOwnPtr<HTMLPreloadScanner> create(const HTMLParserOptions& options, const KURL& documentURL, PassOwnPtr<CachedDocumentParameters> documentParameters)
     {
-        return adoptPtr(new HTMLPreloadScanner(options, documentURL, mediaValues));
+        return adoptPtr(new HTMLPreloadScanner(options, documentURL, documentParameters));
     }
 
 
-    HTMLPreloadScanner(const HTMLParserOptions&, const KURL& documentURL, PassRefPtr<MediaValues>);
+    HTMLPreloadScanner(const HTMLParserOptions&, const KURL& documentURL, PassOwnPtr<CachedDocumentParameters>);
     ~HTMLPreloadScanner();
 
     void appendToEnd(const SegmentedString&);
     void scan(ResourcePreloader*, const KURL& documentBaseElementURL);
 
 private:
     TokenPreloadScanner m_scanner;
     SegmentedString m_source;
     HTMLToken m_token;
     OwnPtr<HTMLTokenizer> m_tokenizer;
 };
 
 }
 
 #endif