Set a minimum tooltip auto-pop timeout of 10 seconds on web content tooltips

chrome/browser/renderer_host/render_widget_host_view_win.cc

 // Copyright (c) 2011 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/renderer_host/render_widget_host_view_win.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/i18n/rtl.h"
@@ skipping 1725 matching lines @@
         TOOLTIPS_CLASS, NULL, TTS_NOPREFIX, 0, 0, 0, 0, m_hWnd, NULL,
         NULL, NULL);
     if (!tooltip_hwnd_) {
       // Tooltip creation can inexplicably fail. See bug 82913 for details.
       LOG_GETLASTERROR(WARNING) <<
           "Tooltip creation failed, tooltips won't work";
       return;
     }
     ti.uFlags = TTF_TRANSPARENT;
     ti.lpszText = LPSTR_TEXTCALLBACK;
+
+    // Ensure web content tooltips are displayed for at least this amount of
+    // time, to give users a chance to read longer messages.
+    const int kMinimumAutopopDurationMs = 10 * 1000;
+    int autopop_duration_ms =
+        SendMessage(tooltip_hwnd_, TTM_GETDELAYTIME, TTDT_AUTOPOP, NULL);
+    if (autopop_duration_ms < kMinimumAutopopDurationMs) {
+      SendMessage(tooltip_hwnd_, TTM_SETDELAYTIME, TTDT_AUTOPOP,
+                  kMinimumAutopopDurationMs);
+    }
   }
 
   CRect cr;
   GetClientRect(&ti.rect);
   SendMessage(tooltip_hwnd_, message, NULL, reinterpret_cast<LPARAM>(&ti));
 }
 
 void RenderWidgetHostViewWin::ResetTooltip() {
   if (::IsWindow(tooltip_hwnd_))
     ::DestroyWindow(tooltip_hwnd_);
@@ skipping 63 matching lines @@
                                                       DWORD ex_style) {
   parent_hwnd_ = parent_hwnd;
   Create(parent_hwnd_, NULL, NULL, WS_POPUP, ex_style);
   MoveWindow(pos.x(), pos.y(), pos.width(), pos.height(), TRUE);
   // To show tooltip on popup window.(e.g. title in <select>)
   // Popups default to showing, which means |DidBecomeSelected()| isn't invoked.
   // Ensure the tooltip is created otherwise tooltips are never shown.
   EnsureTooltip();
   ShowWindow(IsActivatable() ? SW_SHOW : SW_SHOWNA);
 }