Remove a linear search in SkPictureRecord::addTextBlob.

src/core/SkPictureRecord.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkPictureRecord.h"
 #include "SkBBoxHierarchy.h"
 #include "SkDevice.h"
@@ skipping 1526 matching lines @@
     fWriter.writeRegion(region);
 }
 
 void SkPictureRecord::addText(const void* text, size_t byteLength) {
     fContentInfo.onDrawText();
     addInt(SkToInt(byteLength));
     fWriter.writePad(text, byteLength);
 }
 
 void SkPictureRecord::addTextBlob(const SkTextBlob *blob) {
-    int index = fTextBlobRefs.find(blob);
-    if (index < 0) {    // not found
-        index = fTextBlobRefs.count();
-        *fTextBlobRefs.append() = blob;
-        blob->ref();
-    }
+    int index = fTextBlobRefs.count();
+    *fTextBlobRefs.append() = blob;
+    blob->ref();
     // follow the convention of recording a 1-based index
     this->addInt(index + 1);
 }
 
 ///////////////////////////////////////////////////////////////////////////////