GetViewBounds should use screen coordinates but not parents.

content/browser/renderer_host/render_widget_host_view_gtk.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 "content/browser/renderer_host/render_widget_host_view_gtk.h"
 
 // If this gets included after the gtk headers, then a bunch of compiler
 // errors happen because of a "#define Status int" in Xlib.h, which interacts
 // badly with net::URLRequestStatus::Status.
 #include "content/common/view_messages.h"
@@ skipping 708 matching lines @@
 
 void RenderWidgetHostViewGtk::Hide() {
   gtk_widget_hide(view_.get());
 }
 
 bool RenderWidgetHostViewGtk::IsShowing() {
   return gtk_widget_get_visible(view_.get());
 }
 
 gfx::Rect RenderWidgetHostViewGtk::GetViewBounds() const {
-  GtkAllocation* alloc = &view_.get()->allocation;
-  return gfx::Rect(alloc->x, alloc->y,
-                   requested_size_.width(),
-                   requested_size_.height());
+  GdkWindow* gdk_window = view_.get()->window;
+  if (!gdk_window)
+    return gfx::Rect(requested_size_);
+  GdkRectangle window_rect;
+  gdk_window_get_origin(gdk_window, &window_rect.x, &window_rect.y);
+  return gfx::Rect(window_rect.x, window_rect.y,
+                   requested_size_.width(), requested_size_.height());
 }
 
 void RenderWidgetHostViewGtk::UpdateCursor(const WebCursor& cursor) {
   // Optimize the common case, where the cursor hasn't changed.
   // However, we can switch between different pixmaps, so only on the
   // non-pixmap branch.
   if (current_cursor_.GetCursorType() != GDK_CURSOR_IS_PIXMAP &&
       current_cursor_.GetCursorType() == cursor.GetCursorType()) {
     return;
   }
@@ skipping 506 matching lines @@
   last_mouse_down_ = temp;
 }
 
 // static
 void RenderWidgetHostView::GetDefaultScreenInfo(
     WebKit::WebScreenInfo* results) {
   GdkWindow* gdk_window =
       gdk_display_get_default_group(gdk_display_get_default());
   GetScreenInfoFromNativeWindow(gdk_window, results);
 }