Move glyph lookup to hb-ot-font and remove glyph cache in HarfBuzzFace

third_party/WebKit/Source/platform/fonts/shaping/HarfBuzzShaper.cpp

 /*
  * Copyright (c) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 BlackBerry Limited. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 35 matching lines @@
 #include "wtf/text/Unicode.h"
 
 #include <algorithm>
 #include <hb.h>
 #include <unicode/normlzr.h>
 #include <unicode/uchar.h>
 #include <unicode/uscript.h>
 
 namespace blink {
 
-template<typename T>
-class HarfBuzzScopedPtr {
-    STACK_ALLOCATED();
-    WTF_MAKE_NONCOPYABLE(HarfBuzzScopedPtr);
-public:
-    typedef void (*DestroyFunction)(T*);
-
-    HarfBuzzScopedPtr(T* ptr, DestroyFunction destroy)
-        : m_ptr(ptr)
-        , m_destroy(destroy)
-    {
-        ASSERT(m_destroy);
-    }
-    ~HarfBuzzScopedPtr()
-    {
-        if (m_ptr)
-            (*m_destroy)(m_ptr);
-    }
-
-    T* get() { return m_ptr; }
-    void set(T* ptr) { m_ptr = ptr; }
-private:
-    T* m_ptr;
-    DestroyFunction m_destroy;
-};
-
 static inline float harfBuzzPositionToFloat(hb_position_t value)
 {
     return static_cast<float>(value) / (1 << 16);
 }
 
 static void normalizeCharacters(const TextRun& run, unsigned length, UChar* destination, unsigned* destinationLength)
 {
     unsigned position = 0;
     bool error = false;
     const UChar* source;
@@ skipping 705 matching lines @@
     }
 
     // Don't need to check m_textRun.allowsTrailingExpansion() since it's covered by !m_expansionOpportunityCount above
     spacing += nextExpansionPerOpportunity();
     m_isAfterExpansion = true;
     return spacing;
 }
 
 
 } // namespace blink