A couple of multiple displays support fixes.

ash/display/display_controller.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 "ash/display/display_controller.h"
 
 #include "ash/ash_switches.h"
 #include "ash/display/multi_display_manager.h"
 #include "ash/root_window_controller.h"
 #include "ash/screen_ash.h"
@@ skipping 45 matching lines @@
 }
 
 void DisplayController::InitSecondaryDisplays() {
   aura::DisplayManager* display_manager =
       aura::Env::GetInstance()->display_manager();
   for (size_t i = 1; i < display_manager->GetNumDisplays(); ++i) {
     const gfx::Display* display = display_manager->GetDisplayAt(i);
     aura::RootWindow* root = AddRootWindowForDisplay(*display);
     Shell::GetInstance()->InitRootWindowForSecondaryDisplay(root);
   }
+  UpdateDisplayBoundsForLayout();
 }
 
 aura::RootWindow* DisplayController::GetPrimaryRootWindow() {
   DCHECK(!root_windows_.empty());
   return root_windows_[0];
 }
 
 aura::RootWindow* DisplayController::GetRootWindowForDisplayId(int id) {
   return root_windows_[id];
 }
@@ skipping 211 matching lines @@
       break;
   }
   gfx::Insets insets = secondary_display->GetWorkAreaInsets();
   secondary_display->set_bounds(
       gfx::Rect(new_secondary_origin, secondary_bounds.size()));
   secondary_display->UpdateWorkAreaFromInsets(insets);
 }
 
 }  // namespace internal
 }  // namespace ash