Fix incorrect bitmask check.

chrome/browser/ui/views/frame/minimize_button_metrics_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 "chrome/browser/ui/views/frame/minimize_button_metrics_win.h"
 
 #include "base/logging.h"
 #include "base/i18n/rtl.h"
 #include "ui/base/win/shell.h"
 #include "ui/gfx/win/dpi.h"
 
 namespace {
 
 int GetMinimizeButtonOffsetForWindow(HWND hwnd) {
   // The WM_GETTITLEBARINFOEX message can fail if we are not active/visible. By
   // fail we get a location of 0; the return status code is always the same and
   // similarly the state never seems to change (titlebar_info.rgstate).
   TITLEBARINFOEX titlebar_info = {0};
   titlebar_info.cbSize = sizeof(TITLEBARINFOEX);
   SendMessage(hwnd, WM_GETTITLEBARINFOEX, 0,
               reinterpret_cast<WPARAM>(&titlebar_info));
 
   if (titlebar_info.rgrect[2].left == titlebar_info.rgrect[2].right ||
-      (titlebar_info.rgstate[2] & (STATE_SYSTEM_INVISIBLE ||
-                                   STATE_SYSTEM_OFFSCREEN ||
+      (titlebar_info.rgstate[2] & (STATE_SYSTEM_INVISIBLE |
+                                   STATE_SYSTEM_OFFSCREEN |
                                    STATE_SYSTEM_UNAVAILABLE))) {
     return 0;
   }
 
   // Most versions of Windows return screen coordinates for
   // WM_GETTITLEBARINFOEX. Since chrome is not dpi aware (currently) we need to
   // unscale these coordinates. Surface Pro seems to be unique, in that it
   // returns local coordinates (eg they don't need to be scaled). There doesn't
   // appear to be a clear way to detect this, so we assume that if the minimize
   // button is outside the bounds of the window coordinates are scaled.
@@ skipping 69 matching lines @@
     cached_minimize_button_x_delta_ = minimize_button_offset;
   } else {
     RECT client_rect = {0};
     GetClientRect(hwnd_, &client_rect);
     cached_minimize_button_x_delta_ =
         client_rect.right - minimize_button_offset;
   }
   last_cached_minimize_button_x_delta_ = cached_minimize_button_x_delta_;
   return minimize_button_offset;
 }