Make PPAPI headers compile with C compilers (gcc on Linux & Mac and MSVS on W...

ppapi/tests/test_var_deprecated.cc

 // Copyright (c) 2010 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_var_deprecated.h"
 
 #include <string.h>
 
 #include <limits>
 
@@ skipping 201 matching lines @@
   result = var_interface_->VarToUtf8(PP_MakeNull(), &length);
   if (length != 0) {
     return "Expected 0 on string conversion from Null var.";
   }
   if (result != NULL) {
     return "Expected NULL on string conversion from Null var.";
   }
 
   length = kInvalidLength;
   result = NULL;
-  result = var_interface_->VarToUtf8(PP_MakeBool(true), &length);
+  result = var_interface_->VarToUtf8(PP_MakeBool(PP_TRUE), &length);
   if (length != 0) {
     return "Expected 0 on string conversion from Bool var.";
   }
   if (result != NULL) {
     return "Expected NULL on string conversion from Bool var.";
   }
 
   length = kInvalidLength;
   result = NULL;
   result = var_interface_->VarToUtf8(PP_MakeInt32(1), &length);
@@ skipping 87 matching lines @@
     ASSERT_FALSE(exception.is_undefined());
   }
 
   // Make sure nothing leaked.
   ASSERT_TRUE(testing_interface_->GetLiveObjectCount(
       pp::Module::Get()->pp_module()) == before_objects);
 
   return std::string();
 }