--- a/ipc/chromium/src/base/message_pump_win.cc
+++ b/ipc/chromium/src/base/message_pump_win.cc
@@ -156,18 +156,16 @@ void MessagePumpForUI::PumpOutPendingPai
   for (peek_count = 0; peek_count < kMaxPeekCount; ++peek_count) {
     MSG msg;
     if (!PeekMessage(&msg, NULL, 0, 0, PM_REMOVE | PM_QS_PAINT))
       break;
     ProcessMessageHelper(msg);
     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);
 }
 
 //-----------------------------------------------------------------------------
 // MessagePumpForUI private:
 
 // static
 LRESULT CALLBACK MessagePumpForUI::WndProcThunk(
     HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam) {