Don't call NPP_SetWindow before we have the plugin geometry.

chrome/browser/renderer_host/render_widget_host_view_win.cc

 // Copyright (c) 2006-2008 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 "app/gfx/canvas.h"
 #include "app/l10n_util.h"
 #include "app/l10n_util_win.h"
 #include "app/resource_bundle.h"
@@ skipping 320 matching lines @@
       // We move the intermediate parent window which doesn't result in cross-
       // process synchronous Windows messages.
       window = parent;
     }
 
     if (move.visible)
       flags |= SWP_SHOWWINDOW;
     else
       flags |= SWP_HIDEWINDOW;
 
-    HRGN hrgn = ::CreateRectRgn(move.clip_rect.x(),
-                                move.clip_rect.y(),
-                                move.clip_rect.right(),
-                                move.clip_rect.bottom());
-    gfx::SubtractRectanglesFromRegion(hrgn, move.cutout_rects);
+    if (move.rects_valid) {
+      HRGN hrgn = ::CreateRectRgn(move.clip_rect.x(),
+                                  move.clip_rect.y(),
+                                  move.clip_rect.right(),
+                                  move.clip_rect.bottom());
+      gfx::SubtractRectanglesFromRegion(hrgn, move.cutout_rects);
 
-    // Note: System will own the hrgn after we call SetWindowRgn,
-    // so we don't need to call DeleteObject(hrgn)
-    ::SetWindowRgn(window, hrgn, !move.clip_rect.IsEmpty());
+      // Note: System will own the hrgn after we call SetWindowRgn,
+      // so we don't need to call DeleteObject(hrgn)
+      ::SetWindowRgn(window, hrgn, !move.clip_rect.IsEmpty());
+    } else {
+      flags |= SWP_NOMOVE;
+      flags |= SWP_NOSIZE;
+    }
 
     defer_window_pos_info = ::DeferWindowPos(defer_window_pos_info,
                                              window, NULL,
                                              move.window_rect.x(),
                                              move.window_rect.y(),
                                              move.window_rect.width(),
                                              move.window_rect.height(), flags);
     if (!defer_window_pos_info) {
       DCHECK(false) << "DeferWindowPos failed, so all plugin moves ignored.";
       return;
@@ skipping 948 matching lines @@
     // WM_LBUTTONDOWN.
     SetFocus();
   }
 }
 
 void RenderWidgetHostViewWin::ShutdownHost() {
   shutdown_factory_.RevokeAll();
   render_widget_host_->Shutdown();
   // Do not touch any members at this point, |this| has been deleted.
 }