Update screen rects when showing an infobar.

content/browser/renderer_host/render_widget_host_impl.cc

 // Copyright (c) 2012 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_impl.h"
 
 #include <math.h>
 #include <utility>
 
 #include "base/auto_reset.h"
@@ skipping 255 matching lines @@
 
   if (is_hidden_) {
     // On GTK, this comes in for backgrounded tabs. Ignore, to match what
     // happens on Win & Mac, and when the view is shown it'll call this again.
     return;
   }
 
   if (!view_)
     return;
 
-  last_view_screen_rect_ = view_->GetViewBounds();
-  last_window_screen_rect_ = view_->GetBoundsInRootWindow();
+  gfx::Rect new_view_screen_rect = view_->GetViewBounds();
+  gfx::Rect new_window_screen_rect = view_->GetBoundsInRootWindow();
+  if (last_view_screen_rect_ == new_view_screen_rect &&
+      last_window_screen_rect_ == new_window_screen_rect)
+      return;
   Send(new ViewMsg_UpdateScreenRects(
-      GetRoutingID(), last_view_screen_rect_, last_window_screen_rect_));
+      GetRoutingID(), new_view_screen_rect, new_window_screen_rect));
+  last_view_screen_rect_ = new_view_screen_rect;
+  last_window_screen_rect_ = new_window_screen_rect;
   waiting_for_screen_rects_ack_ = true;
 }
 
 void RenderWidgetHostImpl::Init() {
   DCHECK(process_->HasConnection());
 
   renderer_initialized_ = true;
 
   GpuSurfaceTracker::Get()->SetSurfaceHandle(
       surface_id_, GetCompositingSurface());
@@ skipping 2029 matching lines @@
     return;
 
   OnRenderAutoResized(new_size);
 }
 
 void RenderWidgetHostImpl::DetachDelegate() {
   delegate_ = NULL;
 }
 
 }  // namespace content