Disables tooltips if we can't create the tooltip window. I still don't

views/widget/tooltip_manager_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 "views/widget/tooltip_manager_win.h"
 
 #include <windowsx.h>
 #include <limits>
 
 #include "base/i18n/rtl.h"
@@ skipping 18 matching lines @@
 // static
 int TooltipManager::GetTooltipHeight() {
   DCHECK(tooltip_height_ > 0);
   return tooltip_height_;
 }
 
 static gfx::Font DetermineDefaultFont() {
   HWND window = CreateWindowEx(
       WS_EX_TRANSPARENT | l10n_util::GetExtendedTooltipStyles(),
       TOOLTIPS_CLASS, NULL, 0 , 0, 0, 0, 0, NULL, NULL, NULL, NULL);
-  ui::CheckWindowCreated(window);
+  if (!window)
+    return gfx::Font();
   HFONT hfont = reinterpret_cast<HFONT>(SendMessage(window, WM_GETFONT, 0, 0));
   gfx::Font font = hfont ? gfx::Font(hfont) : gfx::Font();
   DestroyWindow(window);
   return font;
 }
 
 // static
 gfx::Font TooltipManager::GetDefaultFont() {
   static gfx::Font* font = NULL;
   if (!font)
@@ skipping 33 matching lines @@
   Init();
 }
 
 TooltipManagerWin::~TooltipManagerWin() {
   if (tooltip_hwnd_)
     DestroyWindow(tooltip_hwnd_);
   if (keyboard_tooltip_hwnd_)
     DestroyWindow(keyboard_tooltip_hwnd_);
 }
 
-void TooltipManagerWin::Init() {
+bool TooltipManagerWin::Init() {
   // Create the tooltip control.
   tooltip_hwnd_ = CreateWindowEx(
       WS_EX_TRANSPARENT | l10n_util::GetExtendedTooltipStyles(),
       TOOLTIPS_CLASS, NULL, TTS_NOPREFIX, 0, 0, 0, 0,
       GetParent(), NULL, NULL, NULL);
-  ui::CheckWindowCreated(tooltip_hwnd_);
+  if (!tooltip_hwnd_)
+    return false;
 
   l10n_util::AdjustUIFontForWindow(tooltip_hwnd_);
 
   // This effectively turns off clipping of tooltips. We need this otherwise
   // multi-line text (\r\n) won't work right. The size doesn't really matter
   // (just as long as its bigger than the monitor's width) as we clip to the
   // screen size before rendering.
   SendMessage(tooltip_hwnd_, TTM_SETMAXTIPWIDTH, 0,
               std::numeric_limits<short>::max());
 
   // Add one tool that is used for all tooltips.
   toolinfo_.cbSize = sizeof(toolinfo_);
   toolinfo_.uFlags = TTF_TRANSPARENT | TTF_IDISHWND;
   toolinfo_.hwnd = GetParent();
   toolinfo_.uId = reinterpret_cast<UINT_PTR>(GetParent());
   // Setting this tells windows to call GetParent() back (using a WM_NOTIFY
   // message) for the actual tooltip contents.
   toolinfo_.lpszText = LPSTR_TEXTCALLBACK;
   SetRectEmpty(&toolinfo_.rect);
   SendMessage(tooltip_hwnd_, TTM_ADDTOOL, 0, (LPARAM)&toolinfo_);
+  return true;
 }
 
 gfx::NativeView TooltipManagerWin::GetParent() {
   return widget_->GetNativeView();
 }
 
 void TooltipManagerWin::UpdateTooltip() {
   // Set last_view_out_of_sync_ to indicate the view is currently out of sync.
   // This doesn't update the view under the mouse immediately as it may cause
   // timing problems.
@@ skipping 198 matching lines @@
   HideKeyboardTooltip();
   std::wstring tooltip_text;
   if (!focused_view->GetTooltipText(gfx::Point(), &tooltip_text))
     return;
   gfx::Rect focused_bounds = focused_view->bounds();
   gfx::Point screen_point;
   focused_view->ConvertPointToScreen(focused_view, &screen_point);
   keyboard_tooltip_hwnd_ = CreateWindowEx(
       WS_EX_TRANSPARENT | l10n_util::GetExtendedTooltipStyles(),
       TOOLTIPS_CLASS, NULL, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL);
-  ui::CheckWindowCreated(keyboard_tooltip_hwnd_);
+  if (!keyboard_tooltip_hwnd_)
+    return;
+
   SendMessage(keyboard_tooltip_hwnd_, TTM_SETMAXTIPWIDTH, 0,
               std::numeric_limits<short>::max());
   int tooltip_width;
   int line_count;
   TrimTooltipToFit(&tooltip_text, &tooltip_width, &line_count,
                    screen_point.x(), screen_point.y());
   TOOLINFO keyboard_toolinfo;
   memset(&keyboard_toolinfo, 0, sizeof(keyboard_toolinfo));
   keyboard_toolinfo.cbSize = sizeof(keyboard_toolinfo);
   keyboard_toolinfo.hwnd = GetParent();
@@ skipping 29 matching lines @@
     keyboard_tooltip_hwnd_ = NULL;
   }
 }
 
 void TooltipManagerWin::DestroyKeyboardTooltipWindow(HWND window_to_destroy) {
   if (keyboard_tooltip_hwnd_ == window_to_destroy)
     HideKeyboardTooltip();
 }
 
 }  // namespace views