Fixes for re-enabling more MSVC level 4 warnings: ppapi/ edition

ppapi/tests/test_file_mapping.cc

 // Copyright 2014 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/tests/test_file_mapping.h"
 
 #include <string.h>
 
 #include <limits>
 #include <string>
@@ skipping 285 matching lines @@
   ASSERT_EQ(PP_ERROR_BADARGUMENT, callback.result());
   ASSERT_EQ(NULL, address);
   // TODO(dmichael): Check & test length that is not a multiple of page size???
 
   // Bad protection.
   callback.WaitForResult(
       file_mapping_if_->Map(
           instance_->pp_instance(),
           file_io.pp_resource(),
           page_size,
-          ~PP_FILEMAPPROTECTION_READ,
+          ~static_cast<uint32_t>(PP_FILEMAPPROTECTION_READ),
           PP_FILEMAPFLAG_PRIVATE,
           0,
           &address,
           callback.GetCallback().pp_completion_callback()));
   CHECK_CALLBACK_BEHAVIOR(callback);
   ASSERT_EQ(PP_ERROR_BADARGUMENT, callback.result());
   ASSERT_EQ(NULL, address);
 
   // No flags.
   callback.WaitForResult(
@@ skipping 25 matching lines @@
   ASSERT_EQ(PP_ERROR_BADARGUMENT, callback.result());
   ASSERT_EQ(NULL, address);
 
   // Bad flags.
   callback.WaitForResult(
       file_mapping_if_->Map(
           instance_->pp_instance(),
           file_io.pp_resource(),
           page_size,
           PP_FILEMAPPROTECTION_READ,
-          ~PP_FILEMAPFLAG_SHARED,
+          ~static_cast<uint32_t>(PP_FILEMAPFLAG_SHARED),
           0,
           &address,
           callback.GetCallback().pp_completion_callback()));
   CHECK_CALLBACK_BEHAVIOR(callback);
   ASSERT_EQ(PP_ERROR_BADARGUMENT, callback.result());
   ASSERT_EQ(NULL, address);
 
   // Bad offset; not a multiple of page size.
   callback.WaitForResult(
       file_mapping_if_->Map(
           instance_->pp_instance(),
           file_io.pp_resource(),
           page_size,
           PP_FILEMAPPROTECTION_READ,
-          ~PP_FILEMAPFLAG_SHARED,
+          ~static_cast<uint32_t>(PP_FILEMAPFLAG_SHARED),
           1,
           &address,
           callback.GetCallback().pp_completion_callback()));
   CHECK_CALLBACK_BEHAVIOR(callback);
   ASSERT_EQ(PP_ERROR_BADARGUMENT, callback.result());
   ASSERT_EQ(NULL, address);
 
   // Unmap NULL.
   callback.WaitForResult(
       file_mapping_if_->Unmap(
@@ skipping 152 matching lines @@
                                   0,
                                   &new_file_contents2,
                                   callback_type()));
   ASSERT_EQ(expected_file_contents2, new_file_contents2);
 
   // TODO(dmichael): Test non-zero offset
 
   PASS();
 }