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

chrome/gpu/gpu_backing_store_win.cc

Index: chrome/gpu/gpu_backing_store_win.cc
diff --git a/chrome/gpu/gpu_backing_store_win.cc b/chrome/gpu/gpu_backing_store_win.cc
index d5af441c89661170420697c4e75384c5af8d4f49..2b2236976a13632c6342477d0dbe3a35231950b6 100644
--- a/chrome/gpu/gpu_backing_store_win.cc
+++ b/chrome/gpu/gpu_backing_store_win.cc
@@ -116,21 +116,10 @@ void GpuBackingStoreWin::OnChannelError() {
 }
 
 void GpuBackingStoreWin::OnPaintToBackingStore(
-    base::ProcessId source_process_id,
-    TransportDIB::Id id,
+    TransportDIB::Handle dib_handle,
     const gfx::Rect& bitmap_rect,
     const std::vector<gfx::Rect>& copy_rects) {
-  HANDLE source_process_handle = OpenProcess(PROCESS_ALL_ACCESS,
-                                             FALSE, source_process_id);
-  CHECK(source_process_handle);
-
-  // On Windows we need to duplicate the handle from the remote process.
-  // See BrowserRenderProcessHost::MapTransportDIB for how to do this on other
-  // platforms.
-  HANDLE section = win_util::GetSectionFromProcess(
-      id.handle, source_process_handle, false /* read write */);
-  CHECK(section);
-  scoped_ptr<TransportDIB> dib(TransportDIB::Map(section));
+  scoped_ptr<TransportDIB> dib(TransportDIB::Map(dib_handle));
   CHECK(dib.get());
 
   if (!backing_store_dib_) {
@@ -168,7 +157,6 @@ void GpuBackingStoreWin::OnPaintToBackingStore(
     view_->InvalidateRect(&paint_rect.ToRECT());
   }
 
-  CloseHandle(source_process_handle);
   gpu_thread_->Send(new GpuHostMsg_PaintToBackingStore_ACK(routing_id_));
 }