On Windows, create a new TransportDIB::Handle struct which includes the file

chrome/browser/renderer_host/mock_render_process_host.cc

Index: chrome/browser/renderer_host/mock_render_process_host.cc
diff --git a/chrome/browser/renderer_host/mock_render_process_host.cc b/chrome/browser/renderer_host/mock_render_process_host.cc
index a2ccfa096439e2456e9b0e10c7c39e336a9e516e..e39d5b7f026a93859b328970a3d2a135d71f1dc7 100644
--- a/chrome/browser/renderer_host/mock_render_process_host.cc
+++ b/chrome/browser/renderer_host/mock_render_process_host.cc
@@ -98,20 +98,17 @@ bool MockRenderProcessHost::Send(IPC::Message* msg) {
   return true;
 }
 
-TransportDIB* MockRenderProcessHost::GetTransportDIB(TransportDIB::Id dib_id) {
+TransportDIB* MockRenderProcessHost::GetTransportDIB(
+    TransportDIB::Id dib_id, TransportDIB::Handle dib_handle) {
+  TransportDIB::ScopedHandle scoped_dib_handle(dib_handle);
   if (transport_dib_)
     return transport_dib_;
-#if defined(OS_WIN)
-  HANDLE duped;
-  DuplicateHandle(GetCurrentProcess(), dib_id.handle, GetCurrentProcess(),
-                  &duped, 0, TRUE, DUPLICATE_SAME_ACCESS);
-  transport_dib_ = TransportDIB::Map(duped);
-#elif defined(OS_MACOSX)
+#if defined(OS_MACOSX)
   // On Mac, TransportDIBs are always created in the browser, so we cannot map
   // one from a dib_id.
   transport_dib_ = TransportDIB::Create(100 * 100 * 4, 0);
-#elif defined(OS_POSIX)
-  transport_dib_ = TransportDIB::Map(dib_id);
+#else
+  transport_dib_ = TransportDIB::Map(scoped_dib_handle.release());
 #endif
 
   return transport_dib_;