Avoid one temporary copy on web fonts decoding

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

Index: third_party/WebKit/Source/platform/fonts/WebFontDecoder.h
diff --git a/third_party/WebKit/Source/modules/webdatabase/SQLTransactionClient.h b/third_party/WebKit/Source/platform/fonts/WebFontDecoder.h
similarity index 73%
copy from third_party/WebKit/Source/modules/webdatabase/SQLTransactionClient.h
copy to third_party/WebKit/Source/platform/fonts/WebFontDecoder.h
index fbb8d7b8582b8370265e71150fd5646e558191df..ff2d6a8f0d744bf2cde9961bb72e6d3502991426 100644
--- a/third_party/WebKit/Source/modules/webdatabase/SQLTransactionClient.h
+++ b/third_party/WebKit/Source/platform/fonts/WebFontDecoder.h
@@ -28,26 +28,36 @@
  * 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