Coverity fixes for uninitialized vars

ppapi/proxy/ppb_var_deprecated_proxy.cc

 // 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.
 
 #include "ppapi/proxy/ppb_var_deprecated_proxy.h"
 
 #include <stdlib.h>  // For malloc
 
 #include "base/bind.h"
 #include "base/logging.h"
@@ skipping 325 matching lines @@
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBVar_CreateObjectDeprecated,
                         OnMsgCreateObjectDeprecated)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   // TODO(brettw) handle bad messages!
   return handled;
 }
 
 void PPB_Var_Deprecated_Proxy::OnMsgAddRefObject(int64 object_id,
                                                  int* /* unused */) {
-  PP_Var var;
-  var.type = PP_VARTYPE_OBJECT;
+  PP_Var var = { PP_VARTYPE_OBJECT };
   var.value.as_id = object_id;
   ppb_var_impl_->AddRef(var);
 }
 
 void PPB_Var_Deprecated_Proxy::OnMsgReleaseObject(int64 object_id) {
   // Ok, so this is super subtle.
   // When the browser side sends a sync IPC message that returns a var, and the
   // plugin wants to give ownership of that var to the browser, dropping all
   // references, it may call ReleaseObject right after returning the result.
   // However, the IPC system doesn't enforce strict ordering of messages in that
@@ skipping 139 matching lines @@
 }
 
 void PPB_Var_Deprecated_Proxy::SetAllowPluginReentrancy() {
   if (dispatcher()->IsPlugin())
     NOTREACHED();
   else
     static_cast<HostDispatcher*>(dispatcher())->set_allow_plugin_reentrancy();
 }
 
 void PPB_Var_Deprecated_Proxy::DoReleaseObject(int64 object_id) {
-  PP_Var var;
-  var.type = PP_VARTYPE_OBJECT;
+  PP_Var var = { PP_VARTYPE_OBJECT };
   var.value.as_id = object_id;
   ppb_var_impl_->Release(var);
 }
 
 }  // namespace proxy
 }  // namespace ppapi