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

tests/RecordReplaceDrawTest.cpp

Index: tests/RecordReplaceDrawTest.cpp
diff --git a/tests/RecordReplaceDrawTest.cpp b/tests/RecordReplaceDrawTest.cpp
index 473683bc56ac27f65d841c54e5cf640cd40c64cd..8c45ee14dddfeb697de3e0e22d475aa4a2b16380 100644
--- a/tests/RecordReplaceDrawTest.cpp
+++ b/tests/RecordReplaceDrawTest.cpp
@@ -108,7 +108,7 @@ void test_replacements(skiatest::Reporter* r, GrContext* context, bool useBBH) {
         pic.reset(recorder.endRecording());
     }
 
-    unsigned key[1] = { 0 };
+    int key[1] = { 0 };
 
     SkPaint paint;
     GrLayerCache* layerCache = context->getLayerCache();
@@ -149,7 +149,7 @@ void test_replacements(skiatest::Reporter* r, GrContext* context, bool useBBH) {
     }
 }
 
-DEF_GPUTEST(RecordReplaceDraw, r, factory) { 
+DEF_GPUTEST(RecordReplaceDraw, r, factory) {
     for (int type = 0; type < GrContextFactory::kLastGLContextType; ++type) {
         GrContextFactory::GLContextType glType = static_cast<GrContextFactory::GLContextType>(type);
         if (!GrContextFactory::IsRenderingGLContext(glType)) {