Extend FontCache fallback API to support FontFallbackPriority

third_party/WebKit/Source/platform/fonts/FontCache.h

 /*
  * Copyright (C) 2006, 2008 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) 2007-2008 Torch Mobile, Inc.
  *
  * 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.
@@ skipping 16 matching lines @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef FontCache_h
 #define FontCache_h
 
 #include "platform/PlatformExport.h"
 #include "platform/fonts/FallbackListCompositeKey.h"
 #include "platform/fonts/FontCacheKey.h"
 #include "platform/fonts/FontFaceCreationParams.h"
+#include "platform/fonts/FontFallbackPriority.h"
 #include "wtf/Allocator.h"
 #include "wtf/Forward.h"
 #include "wtf/HashMap.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
 #include "wtf/text/CString.h"
 #include "wtf/text/Unicode.h"
 #include "wtf/text/WTFString.h"
 #include <limits.h>
 
@@ skipping 21 matching lines @@
     friend class FontCachePurgePreventer;
 
     WTF_MAKE_NONCOPYABLE(FontCache); USING_FAST_MALLOC(FontCache);
 public:
     static FontCache* fontCache();
 
     void releaseFontData(const SimpleFontData*);
 
     // This method is implemented by the plaform and used by
     // FontFastPath to lookup the font for a given character.
-    PassRefPtr<SimpleFontData> fallbackFontForCharacter(const FontDescription&, UChar32, const SimpleFontData* fontDataToSubstitute);
+    PassRefPtr<SimpleFontData> fallbackFontForCharacter(const FontDescription&,
+        UChar32,
+        const SimpleFontData* fontDataToSubstitute,
+        FontFallbackPriority = FontFallbackPriority::Text);
 
     // Also implemented by the platform.
     void platformInit();
 
     PassRefPtr<SimpleFontData> getFontData(const FontDescription&, const AtomicString&, bool checkingAlternateName = false, ShouldRetain = Retain);
     PassRefPtr<SimpleFontData> getLastResortFallbackFont(const FontDescription&, ShouldRetain = Retain);
     SimpleFontData* getNonRetainedLastResortFallbackFont(const FontDescription&);
     bool isPlatformFontAvailable(const FontDescription&, const AtomicString&);
 
     // Returns the ShapeCache instance associated with the given cache key.
@@ skipping 110 matching lines @@
     USING_FAST_MALLOC(FontCachePurgePreventer);
     WTF_MAKE_NONCOPYABLE(FontCachePurgePreventer);
 public:
     FontCachePurgePreventer() { FontCache::fontCache()->disablePurging(); }
     ~FontCachePurgePreventer() { FontCache::fontCache()->enablePurging(); }
 };
 
 } // namespace blink
 
 #endif