Enable reference adoption run time checks for Blink+skia in Debug builds

skia/config/sk_ref_cnt_base_debug.h

Index: skia/config/sk_ref_cnt_base_debug.h
diff --git a/skia/config/sk_ref_cnt_base_debug.h b/skia/config/sk_ref_cnt_base_debug.h
new file mode 100644
index 0000000000000000000000000000000000000000..d2ea0173c67a4ca72d6a2ef82288f7cbb316b2ec
--- /dev/null
+++ b/skia/config/sk_ref_cnt_base_debug.h
@@ -0,0 +1,43 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef SK_REF_CNT_BASE_DEBUG_H_
+#define SK_REF_CNT_BASE_DEBUG_H_
+
+// Alternate implementation of SkRefCntBase for Chromium debug builds
+class SK_API SkRefCntBase {
+public:
+  SkRefCntBase() : flags_(0) {}
+  void aboutToRef() const { SkASSERT(flags_ != AdoptionRequired_Flag); }
+  void adopted() const { flags_ |= Adopted_Flag; }
+  void requireAdoption() const { flags_ |= AdoptionRequired_Flag; }
+private:
+  enum {
+  	  Adopted_Flag = 0x1,
+  	  AdoptionRequired_Flag = 0x2,
+  };
+
+  mutable int flags_;
+};
+
+// Bootstrap for Blink's WTF::RefPtr
+
+namespace WTF {
+  inline void adopted(const SkRefCntBase* object) {
+    if (!object)
+      return;
+  	object->adopted();
+  }
+  inline void requireAdoption(const SkRefCntBase* object) {
+    if (!object)
+      return;
+  	object->requireAdoption();
+  }
+};
+
+using WTF::adopted;
+using WTF::requireAdoption;
+
+#endif
+