Add additional move support to ScopedGeneric in the form of operator=.

base/scoped_generic.h

Index: base/scoped_generic.h
diff --git a/base/scoped_generic.h b/base/scoped_generic.h
index da42609e5c484cefc5024f9968f836ea0292eecc..f6807e2b58f2fa3fe425b5e9b0e51a4725b5d963 100644
--- a/base/scoped_generic.h
+++ b/base/scoped_generic.h
@@ -53,7 +53,7 @@ namespace base {
 //   typedef ScopedGeneric<int, FooScopedTraits> ScopedFoo;
 template<typename T, typename Traits>
 class ScopedGeneric {
-  MOVE_ONLY_TYPE_FOR_CPP_03(ScopedGeneric, RValue)
+  MOVE_ONLY_TYPE_WITH_MOVE_CONSTRUCTOR_FOR_CPP_03(ScopedGeneric)
 
  private:
   // This must be first since it's used inline below.
@@ -83,15 +83,21 @@ class ScopedGeneric {
       : data_(value, traits) {
   }
 
-  // Move constructor for C++03 move emulation.
-  ScopedGeneric(RValue rvalue)
-      : data_(rvalue.object->release(), rvalue.object->get_traits()) {
+  // Move constructor. Allows initialization from a ScopedGeneric rvalue.
+  ScopedGeneric(ScopedGeneric<T, Traits>&& rvalue)
+      : data_(rvalue.release(), rvalue.get_traits()) {
   }
 
   ~ScopedGeneric() {
     FreeIfNecessary();
   }
 
+  // operator=. Allows assignment from a ScopedGeneric rvalue.
+  ScopedGeneric& operator=(ScopedGeneric<T, Traits>&& rvalue) {
+    reset(rvalue.release());
+    return *this;
+  }
+
   // Frees the currently owned object, if any. Then takes ownership of a new
   // object, if given. Self-resets are not allowd as on scoped_ptr. See
   // http://crbug.com/162971