unsigned -> int for counts and indices in picture-related code

tests/PictureTest.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBBoxHierarchy.h"
 #include "SkBlurImageFilter.h"
 #include "SkCanvas.h"
@@ skipping 1229 matching lines @@
     REPORTER_ASSERT(reporter, replayBM.getColor(30, 30) == 0xff000080);
     REPORTER_ASSERT(reporter, replayBM.getColor(55, 55) == 0xff800000);
 }
 
 struct CountingBBH : public SkBBoxHierarchy {
     mutable int searchCalls;
     SkRect rootBound;
 
     CountingBBH(const SkRect& bound) : searchCalls(0), rootBound(bound) {}
 
-    void search(const SkRect& query, SkTDArray<unsigned>* results) const override {
+    void search(const SkRect& query, SkTDArray<int>* results) const override {
         this->searchCalls++;
     }
 
     void insert(const SkRect[], int) override {}
     virtual size_t bytesUsed() const override { return 0; }
     SkRect getRootBound() const override { return rootBound; }
 };
 
 class SpoonFedBBHFactory : public SkBBHFactory {
 public:
@@ skipping 94 matching lines @@
 
     SkAutoTDelete<SkStream> rstream(wstream.detachAsStream());
     SkAutoTUnref<SkPicture> deserializedPicture(SkPicture::CreateFromStream(rstream));
 
     REPORTER_ASSERT(r, SkToBool(deserializedPicture));
     REPORTER_ASSERT(r, deserializedPicture->cullRect().left() == 1);
     REPORTER_ASSERT(r, deserializedPicture->cullRect().top() == 2);
     REPORTER_ASSERT(r, deserializedPicture->cullRect().right() == 3);
     REPORTER_ASSERT(r, deserializedPicture->cullRect().bottom() == 4);
 }