Consider the popup window position when the window shows upward. This patch depends on WebKit patch.

chrome/browser/renderer_host/render_widget_host_view_win.cc

Index: chrome/browser/renderer_host/render_widget_host_view_win.cc
diff --git a/chrome/browser/renderer_host/render_widget_host_view_win.cc b/chrome/browser/renderer_host/render_widget_host_view_win.cc
index 459b9e526afd63692b4551d1c752b617dc0d1ed7..3581e186e0d24cd518b0ba26b8a43f2354b2780c 100644
--- a/chrome/browser/renderer_host/render_widget_host_view_win.cc
+++ b/chrome/browser/renderer_host/render_widget_host_view_win.cc
@@ -367,19 +367,29 @@ void RenderWidgetHostViewWin::WasHidden() {
 }
 
 void RenderWidgetHostViewWin::SetSize(const gfx::Size& size) {
+  gfx::Rect rect = GetViewBounds();
+  rect.set_size(size);
+  SetBounds(rect);
+}
+
+void RenderWidgetHostViewWin::SetBounds(const gfx::Rect& rect) {
   if (is_hidden_)
     return;
 
-  // No SWP_NOREDRAW as autofill popups can resize and the underneath window
+  // No SWP_NOREDRAW as autofill popups can move and the underneath window
   // should redraw in that case.
   UINT swp_flags = SWP_NOSENDCHANGING | SWP_NOOWNERZORDER | SWP_NOCOPYBITS |
-      SWP_NOMOVE | SWP_NOZORDER | SWP_NOACTIVATE | SWP_DEFERERASE;
-  SetWindowPos(NULL, 0, 0, size.width(), size.height(), swp_flags);
+      SWP_NOZORDER | SWP_NOACTIVATE | SWP_DEFERERASE;
+  gfx::Rect org_rect = GetViewBounds();
+  if (rect.origin() == org_rect.orgin())

[Peter Kasting, 2011/02/16 22:01:25]

Nit: I don't think you need this conditional.  SWP_NOMOVE is only needed if
you're going to pass "wrong" origin coordinates that need to be ignored.

+    swp_flags |= SWP_NOMOVE;
+  SetWindowPos(NULL, point.x(), point.y(), window_rect.Width(),

[Peter Kasting, 2011/02/16 22:01:25]

You need to change both |point| and |window_rect| to |rect|, and un-capitalize
Width() and Height(), here and below.

+               window_rect.Height(), swp_flags);
   if (compositor_host_window_) {
     ::SetWindowPos(compositor_host_window_,
         NULL,
-        0, 0,
-        size.width(), size.height(),
+        point.x(), point.y(),
+        rect.Width(), rect.Height(),
         SWP_NOSENDCHANGING | SWP_NOCOPYBITS | SWP_NOZORDER | SWP_NOACTIVATE);
   }
   render_widget_host_->WasResized();