Remove unused PumpOutPendingPaintMessages function

base/message_loop/message_pump_win.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/message_loop/message_pump_win.h"
 
 #include <math.h>
 
 #include "base/debug/trace_event.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 154 matching lines @@
                       delay_msec, NULL);
   if (ret)
     return;
   // If we can't set timers, we are in big trouble... but cross our fingers for
   // now.
   // TODO(jar): If we don't see this error, use a CHECK() here instead.
   UMA_HISTOGRAM_ENUMERATION("Chrome.MessageLoopProblem", SET_TIMER_ERROR,
                             MESSAGE_LOOP_PROBLEM_MAX);
 }
 
-void MessagePumpForUI::PumpOutPendingPaintMessages() {
-  // If we are being called outside of the context of Run, then don't try to do
-  // any work.
-  if (!state_)
-    return;
-
-  // Create a mini-message-pump to force immediate processing of only Windows
-  // WM_PAINT messages.  Don't provide an infinite loop, but do enough peeking
-  // to get the job done.  Actual common max is 4 peeks, but we'll be a little
-  // safe here.
-  const int kMaxPeekCount = 20;
-  int peek_count;
-  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) {
   switch (message) {
     case kMsgHaveWork:
       reinterpret_cast<MessagePumpForUI*>(wparam)->HandleWorkMessage();
       break;
@@ skipping 468 matching lines @@
 
 // static
 MessagePumpForIO::IOHandler* MessagePumpForIO::KeyToHandler(
     ULONG_PTR key,
     bool* has_valid_io_context) {
   *has_valid_io_context = ((key & 1) == 0);
   return reinterpret_cast<IOHandler*>(key & ~static_cast<ULONG_PTR>(1));
 }
 
 }  // namespace base