Avoid one temporary copy on web fonts decoding

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

 /*
  * Copyright (C) 2009 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 10 matching lines @@
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR 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 SQLTransactionClient_h
-#define SQLTransactionClient_h
+#ifndef WebFontDecoder_h
+#define WebFontDecoder_h
 
+#include "third_party/skia/include/core/SkTypeface.h"
 #include "wtf/Allocator.h"
-#include "wtf/Noncopyable.h"
+#include "wtf/RefPtr.h"
+#include "wtf/text/WTFString.h"
 
 namespace blink {
 
-class Database;
+class SharedBuffer;
 
-// A client to the SQLTransaction class. Allows SQLTransaction to notify interested
-// parties that certain things have happened in a transaction.
-class SQLTransactionClient {
-    WTF_MAKE_NONCOPYABLE(SQLTransactionClient); USING_FAST_MALLOC(SQLTransactionClient);
+class WebFontDecoder final {
+    STACK_ALLOCATED();
 public:
-    SQLTransactionClient() { }
-    void didCommitWriteTransaction(Database*);
-    bool didExceedQuota(Database*);
+    WebFontDecoder()
+    {
+    }
+
+    PassRefPtr<SkTypeface> decode(SharedBuffer*);
+
+    static bool supportsFormat(const String&);
+    String getErrorString() const { return m_otsErrorString; }
+
+private:
+    void setErrorString(const String& errorString) { m_otsErrorString = errorString; }
+
+    String m_otsErrorString;
 };
 
 } // namespace blink
 
-#endif // SQLTransactionClient_h
+#endif // WebFontDecoder_h