Convert the pp::proxy namespace to the ppapi::proxy namespace.

ppapi/proxy/serialized_var_unittest.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/ppapi_proxy_test.h"
 
 #include "ppapi/proxy/serialized_var.h"
 
-namespace pp {
+namespace ppapi {
 namespace proxy {
 
 namespace {
 
 PP_Var MakeStringVar(int64_t string_id) {
   PP_Var ret;
   ret.type = PP_VARTYPE_STRING;
   ret.value.as_id = string_id;
   return ret;
 }
@@ skipping 161 matching lines @@
     EXPECT_EQ(1, var_tracker().GetRefCountForObject(plugin_object));
   }
 
   // When the ReturnValue object goes out of scope, it should have sent a
   // release message to the browser.
   EXPECT_EQ(-1, var_tracker().GetRefCountForObject(plugin_object));
   EXPECT_EQ(1u, sink().message_count());
 }
 
 }  // namespace proxy
-}  // namespace pp
+}  // namespace ppapi