Add AutoJObject and AutoGlobalJObject

base/android/auto_global_jobject.h

Index: base/android/auto_global_jobject.h
diff --git a/base/android/auto_global_jobject.h b/base/android/auto_global_jobject.h
new file mode 100644
index 0000000000000000000000000000000000000000..35c9a860f9a4e7a4167db020a7c236743f80c869
--- /dev/null
+++ b/base/android/auto_global_jobject.h
@@ -0,0 +1,41 @@
+// Copyright (c) 2011 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 BASE_ANDROID_AUTO_GLOBAL_JOBJECT_H_
+#define BASE_ANDROID_AUTO_GLOBAL_JOBJECT_H_
+
+#include <jni.h>
+
+#include "base/android/auto_jobject.h"
+#include "base/basictypes.h"
+
+namespace base {
+namespace android {
+
+// Holds a global reference to a Java object. The global reference is scoped
+// to the lifetime of this object.
+class AutoGlobalJObject {
+ public:
+  // Holds a NULL reference.
+  AutoGlobalJObject();
+  // Takes a new global reference to the Java object held by obj. The global
+  // reference is deleted when this object goes out of scope.
+  explicit AutoGlobalJObject(const AutoJObject& obj);
+  ~AutoGlobalJObject();
+
+  void Reset();
+  void Reset(const AutoGlobalJObject& other);
+  inline jobject obj() const { return obj_; }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(AutoGlobalJObject);

[brettw, 2011/08/02 15:55:39]

This should be last.

+
+  JNIEnv* env_;
+  jobject obj_;
+};
+
+}  // namespace android
+}  // namespace base
+
+#endif  // BASE_ANDROID_AUTO_GLOBAL_JOBJECT_H_