Rename Instance_Trusted to Instance_Private, wire it up in Chrome.

ppapi/cpp/private/instance_private.h

Index: ppapi/cpp/private/instance_private.h
diff --git a/ppapi/cpp/private/instance_private.h b/ppapi/cpp/private/instance_private.h
new file mode 100644
index 0000000000000000000000000000000000000000..226494c40c00ae9aa37d91238e9f90dab4209791
--- /dev/null
+++ b/ppapi/cpp/private/instance_private.h
@@ -0,0 +1,60 @@
+// 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 PPAPI_CPP_PRIVATE_INSTANCE_PRIVATE_H_
+#define PPAPI_CPP_PRIVATE_INSTANCE_PRIVATE_H_
+
+/**
+ * @file
+ * Defines the API ...
+ *
+ * @addtogroup CPP
+ * @{
+ */
+
+#include "ppapi/cpp/instance.h"
+
+/** The C++ interface to the Pepper API. */
+namespace pp {
+
+class VarPrivate;
+
+class InstancePrivate : public Instance {
+ public:
+  explicit InstancePrivate(PP_Instance instance);
+  virtual ~InstancePrivate();
+
+  // @{
+  /// @name PPP_Instance_Private methods for the plugin to override:
+
+  /// See PPP_Instance_Private.GetInstanceObject.
+  // TODO(dmichael):  Put this virtual function here and remove the
+  //                  'Var GetInstanceObject()' version from pp::Instance.
+  //virtual VarPrivate GetInstanceObject();
+
+  // @}
+
+  // @{
+  /// @name PPB_Instance_Private methods for querying the browser:
+
+  /// See PPB_Instance_Private.GetWindowObject.
+  VarPrivate GetWindowObject();
+
+  /// See PPB_Instance_Private.GetOwnerElementObject.
+  VarPrivate GetOwnerElementObject();
+
+  /// See PPB_Instance.ExecuteScript.
+  VarPrivate ExecuteScript(const VarPrivate& script,
+                           VarPrivate* exception = NULL);
+
+  // @}
+};
+
+}  // namespace pp
+
+/**
+ * @}
+ * End addtogroup CPP
+ */
+#endif  // PPAPI_CPP_PRIVATE_INSTANCE_PRIVATE_H_