Fix jumbo+Win compilation error related to the PostMessage macro

PostMessage is a macro in Windows and depending on whether Windows
headers have been included or not, PostMessage will either be
treated as PostMessage or PostMessageW. We use a special header
windows_types.h to ensure that the macro is always defined
so that there will be no compilation or linking issues missing
either PostMessage or PostMessageW objects.

Bug: 772713,813749

TBR=leon.han@intel.com

Change-Id: I0012774f347ef2e257bc87b4492f58c7be464f78
Reviewed-on: https://chromium-review.googlesource.com/957028Reviewed-by: Daniel Bratell <bratell@opera.com>
Commit-Queue: Daniel Bratell <bratell@opera.com>
Cr-Commit-Position: refs/heads/master@{#542092}

content/browser/service_worker/service_worker_handle.h

@@ -10,12 +10,20 @@
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
+#include "build/build_config.h"
 #include "content/browser/service_worker/service_worker_version.h"
 #include "content/common/content_export.h"
 #include "content/common/service_worker/service_worker_types.h"
 #include "mojo/public/cpp/bindings/associated_binding_set.h"
 #include "third_party/WebKit/public/mojom/service_worker/service_worker_object.mojom.h"
 
+#if defined(OS_WIN)
+// Since PostMessage is a Win32 macro, ensure that it has the same
+// value every time this header is parsed. This avoids strange
+// compilation and linking errors.
+#include "base/win/windows_types.h"
+#endif
+
 namespace url {
 class Origin;
 }  // namespace url