bug 1366294 - Part 9 - Fix Windows Build. r=gfritzsche

MozReview-Commit-ID: 8P2W8fD2xNi

ipc/chromium/src/base/message_pump_win.cc

@@ -161,8 +161,6 @@ void MessagePumpForUI::PumpOutPendingPaintMessages() {
     if (state_->should_quit)  // Handle WM_QUIT.
       break;
   }
-  // Histogram what was really being used, to help to adjust kMaxPeekCount.
-  DHISTOGRAM_COUNTS("Loop.PumpOutPendingPaintMessages Peeks", peek_count);
 }
 
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