Revert 185474 -- speculative. browser_tests stopped starting up on all

ui/base/win/hwnd_subclass.cc

Index: ui/base/win/hwnd_subclass.cc
===================================================================
--- ui/base/win/hwnd_subclass.cc	(revision 185501)
+++ ui/base/win/hwnd_subclass.cc	(working copy)
@@ -9,7 +9,6 @@
 #include "base/logging.h"
 #include "base/memory/scoped_vector.h"
 #include "base/memory/singleton.h"
-#include "ui/base/win/dpi.h"
 #include "ui/base/win/hwnd_util.h"
 
 namespace {
@@ -120,25 +119,6 @@
                                 UINT message,
                                 WPARAM w_param,
                                 LPARAM l_param) {
-
-  // Touch messages are always passed in screen coordinates. If the OS is
-  // scaled, but the app is not DPI aware, then then WM_TOUCH might be
-  // intended for a different window.
-  if (message == WM_TOUCH) {
-    TOUCHINPUT point;
-
-    if (GetTouchInputInfo((HTOUCHINPUT)l_param, 1,
-                                     &point, sizeof(TOUCHINPUT))) {
-      POINT touch_location = {
-          TOUCH_COORD_TO_PIXEL(point.x) / ui::win::GetDPIScaleFromRegistry(),
-          TOUCH_COORD_TO_PIXEL(point.y) / ui::win::GetDPIScaleFromRegistry()};
-      HWND actual_target = WindowFromPoint(touch_location);
-      if (actual_target != hwnd) {
-        return SendMessage(actual_target, message, w_param, l_param);
-      }
-    }
-  }
-
   for (std::vector<HWNDMessageFilter*>::iterator it = filters_.begin();
       it != filters_.end(); ++it) {
     LRESULT l_result = 0;