Add ContentViewDelegate

base/android/jni_helper.cc

Index: base/android/jni_helper.cc
diff --git a/base/android/jni_helper.cc b/base/android/jni_helper.cc
index 3ff3bfb1dfb27cafd6499735f4c7b66e283510fa..6eb991e59909823c5fbac29a86ebece992671505 100644
--- a/base/android/jni_helper.cc
+++ b/base/android/jni_helper.cc
@@ -9,6 +9,15 @@
 
 using base::android::AttachCurrentThread;
 
+JavaObjectWeakGlobalRef::JavaObjectWeakGlobalRef()
+  : obj_(NULL) {
+}
+
+JavaObjectWeakGlobalRef::JavaObjectWeakGlobalRef(
+    const JavaObjectWeakGlobalRef& orig) {
+  assign(orig);
+}
+
 JavaObjectWeakGlobalRef::JavaObjectWeakGlobalRef(JNIEnv* env, jobject obj)
     : obj_(env->NewWeakGlobalRef(obj)) {
   DCHECK(obj_);
@@ -18,6 +27,10 @@ JavaObjectWeakGlobalRef::~JavaObjectWeakGlobalRef() {
   reset();
 }
 
+void JavaObjectWeakGlobalRef::operator=(const JavaObjectWeakGlobalRef& rhs) {
+  assign(rhs);
+}
+
 void JavaObjectWeakGlobalRef::reset() {
   if (obj_) {
     AttachCurrentThread()->DeleteWeakGlobalRef(obj_);
@@ -40,3 +53,12 @@ base::android::ScopedJavaLocalRef<jobject> GetRealObject(
   }
   return base::android::ScopedJavaLocalRef<jobject>(env, real);
 }
+
+void JavaObjectWeakGlobalRef::assign(const JavaObjectWeakGlobalRef& other) {
+  JNIEnv* env = AttachCurrentThread();
+  base::android::ScopedJavaLocalRef<jobject> pinnedObj = other.get(env);
+  if (pinnedObj.is_null())
+    obj_ = NULL;
+  else
+    obj_ = env->NewWeakGlobalRef(pinnedObj.obj());
+}