Use a direct include of strings headers in ui/, part 1.

ui/base/events/event.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 "ui/base/events/event.h"
 
 #if defined(USE_X11)
 #include <X11/Xlib.h>
 #endif
 
 #include <cmath>
 #include <cstring>
 
 #include "base/metrics/histogram.h"
-#include "base/stringprintf.h"
+#include "base/strings/stringprintf.h"
 #include "ui/base/events/event_utils.h"
 #include "ui/base/keycodes/keyboard_code_conversion.h"
 #include "ui/gfx/point3_f.h"
 #include "ui/gfx/point_conversions.h"
 #include "ui/gfx/transform.h"
 #include "ui/gfx/transform_util.h"
 
 #if defined(USE_X11)
 #include "ui/base/keycodes/keyboard_code_conversion_x.h"
 #endif
@@ skipping 706 matching lines @@
 int GestureEvent::GetLowestTouchId() const {
   if (touch_ids_bitfield_ == 0)
     return -1;
   int i = -1;
   // Find the index of the least significant 1 bit
   while (!(1 << ++i & touch_ids_bitfield_));
   return i;
 }
 
 }  // namespace ui