Fix the positioning of the TryChromeDialog when the taskbar is hidden.

chrome/browser/first_run/try_chrome_dialog_view.cc

Index: chrome/browser/first_run/try_chrome_dialog_view.cc
diff --git a/chrome/browser/first_run/try_chrome_dialog_view.cc b/chrome/browser/first_run/try_chrome_dialog_view.cc
index 7927b28ae21bc33055adb3df9515a50a9e674661..da23c9afb9a59532d6858de843871845a992facc 100644
--- a/chrome/browser/first_run/try_chrome_dialog_view.cc
+++ b/chrome/browser/first_run/try_chrome_dialog_view.cc
@@ -279,8 +279,7 @@ TryChromeDialogView::Result TryChromeDialogView::ShowModal(
     separator->SetSize(gfx::Size(preferred.width(), separator_height));
   }
 
-  gfx::Rect pos = ComputeWindowPosition(preferred.width(), preferred.height(),
-                                        base::i18n::IsRTL());
+  gfx::Rect pos = ComputeWindowPosition(preferred, base::i18n::IsRTL());
   popup_->SetBounds(pos);
 
   // Carve the toast shape into the window.
@@ -298,23 +297,22 @@ TryChromeDialogView::Result TryChromeDialogView::ShowModal(
   return result_;
 }
 
-gfx::Rect TryChromeDialogView::ComputeWindowPosition(int width,
-                                                     int height,
+gfx::Rect TryChromeDialogView::ComputeWindowPosition(gfx::Size size,
                                                      bool is_RTL) {
-  // The 'Shell_TrayWnd' is the taskbar. We like to show our window in that
-  // monitor if we can. This code works even if such window is not found.
-  HWND taskbar = ::FindWindowW(L"Shell_TrayWnd", NULL);
-  HMONITOR monitor = ::MonitorFromWindow(taskbar, MONITOR_DEFAULTTOPRIMARY);
+  // A best guess at a visible location in case all else fails.
+  gfx::Point origin(20, 20);
+
+  // The taskbar (the 'Shell_TrayWnd' window) is always on the primary monitor.
+  constexpr POINT kOrigin = {};
   MONITORINFO info = {sizeof(info)};
-  if (!GetMonitorInfoW(monitor, &info)) {
-    // Quite unexpected. Do a best guess at a visible rectangle.
-    return gfx::Rect(20, 20, width + 20, height + 20);
+  if (::GetMonitorInfo(::MonitorFromPoint(kOrigin, MONITOR_DEFAULTTOPRIMARY),
+                       &info)) {
+    // |rcWork| is the work area, accounting for the visible taskbars.
+    origin.set_x(is_RTL ? info.rcWork.left : info.rcWork.right - size.width());
+    origin.set_y(info.rcWork.bottom - size.height());
   }
-  // The |rcWork| is the work area. It should account for the taskbars that
-  // are in the screen when we called the function.
-  int left = is_RTL ? info.rcWork.left : info.rcWork.right - width;
-  int top = info.rcWork.bottom - height;
-  return gfx::Rect(left, top, width, height);
+
+  return gfx::Rect(origin, size);
 }
 
 void TryChromeDialogView::SetToastRegion(HWND window, int w, int h) {