Add OpenTypeCapsSupport class

third_party/WebKit/Source/platform/fonts/opentype/OpenTypeCapsSupport.h

Index: third_party/WebKit/Source/platform/fonts/opentype/OpenTypeCapsSupport.h
diff --git a/third_party/WebKit/Source/platform/fonts/opentype/OpenTypeCapsSupport.h b/third_party/WebKit/Source/platform/fonts/opentype/OpenTypeCapsSupport.h
new file mode 100644
index 0000000000000000000000000000000000000000..7015c2a82f8ba108e43377facfb5b6f6a94c4bbb
--- /dev/null
+++ b/third_party/WebKit/Source/platform/fonts/opentype/OpenTypeCapsSupport.h
@@ -0,0 +1,57 @@
+// Copyright 2016 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.
+
+#ifndef OpenTypeCapsSupport_h
+#define OpenTypeCapsSupport_h
+
+#include "platform/fonts/FontDescription.h"
+#include "platform/fonts/SmallCapsIterator.h"
+#include "platform/fonts/opentype/OpenTypeCapsSupport.h"
+#include "platform/fonts/shaping/CaseMappingHarfBuzzBufferFiller.h"
+#include "platform/fonts/shaping/HarfBuzzFace.h"
+
+#include <hb.h>
+
+namespace blink {
+
+class PLATFORM_EXPORT OpenTypeCapsSupport {
+public:
+    OpenTypeCapsSupport();
+    OpenTypeCapsSupport(const HarfBuzzFace*,
+        FontDescription::FontVariantCaps requestedCaps,
+        hb_script_t);
+
+    bool needsRunCaseSplitting();
+    bool needsSyntheticFont(SmallCapsIterator::SmallCapsBehavior runCase);
+    FontDescription::FontVariantCaps fontFeatureToUse(SmallCapsIterator::SmallCapsBehavior runCase);
+    CaseMapIntend needsCaseChange(SmallCapsIterator::SmallCapsBehavior runCase);
+
+private:
+    void determineFontSupport(hb_script_t);
+    bool supportsOpenTypeFeature(hb_script_t, uint32_t tag) const;
+
+    const HarfBuzzFace* m_harfBuzzFace;
+    FontDescription::FontVariantCaps m_requestedCaps;
+    SmallCapsIterator::SmallCapsBehavior m_runCase;
+
+    enum class FontSupport {
+        Full,
+        Fallback, // Fall back to 'smcp' or 'smcp' + 'c2sc'
+        None
+    };
+
+    enum class CapsSynthesis {
+        None,
+        LowerToSmallCaps,
+        UpperToSmallCaps,
+        BothToSmallCaps
+    };
+
+    FontSupport m_fontSupport;
+    CapsSynthesis m_capsSynthesis;
+};
+
+}; // namespace blink
+
+#endif