Notify resource caches when pixelref genID goes stale

bench/ImageCacheBench.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Benchmark.h"
 #include "SkResourceCache.h"
 
 namespace {
 static void* gGlobalAddress;
 class TestKey : public SkResourceCache::Key {
 public:
     intptr_t fValue;
 
     TestKey(intptr_t value) : fValue(value) {
-        this->init(&gGlobalAddress, sizeof(fValue));
+        this->init(&gGlobalAddress, 0, sizeof(fValue));
     }
 };
 struct TestRec : public SkResourceCache::Rec {
     TestKey     fKey;
     intptr_t    fValue;
 
     TestRec(const TestKey& key, intptr_t value) : fKey(key), fValue(value) {}
 
     const Key& getKey() const SK_OVERRIDE { return fKey; }
     size_t bytesUsed() const SK_OVERRIDE { return sizeof(fKey) + sizeof(fValue); }
@@ skipping 37 matching lines @@
         }
     }
 
 private:
     typedef Benchmark INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 DEF_BENCH( return new ImageCacheBench(); )