Makes overview center the active workspace. This avoids leaving extra

ui/aura_shell/workspace/workspace.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 "ui/aura_shell/workspace/workspace.h"
 
 #include "base/logging.h"
 #include "ui/aura/window.h"
 #include "ui/aura_shell/workspace/workspace_manager.h"
 #include "ui/gfx/compositor/layer.h"
@@ skipping 42 matching lines @@
 
   return true;
 }
 
 void Workspace::RemoveWindow(aura::Window* window) {
   DCHECK(Contains(window));
   windows_.erase(std::find(windows_.begin(), windows_.end(), window));
   Layout(NULL);
 }
 
-
 bool Workspace::Contains(aura::Window* window) const {
   return std::find(windows_.begin(), windows_.end(), window) != windows_.end();
 }
 
 void Workspace::Activate() {
   workspace_manager_->SetActiveWorkspace(this);
 }
 
 void Workspace::Layout(aura::Window* no_animation) {
   gfx::Rect work_area = workspace_manager_->GetWorkAreaBounds(bounds_);
   int total_width = 0;
   for (aura::Window::Windows::const_iterator i = windows_.begin();
        i != windows_.end();
-       i++) {
+       ++i) {
     if (total_width)
       total_width += kWindowHorizontalMargin;
     // TODO(oshima): use restored bounds.
     total_width += (*i)->bounds().width();
   }
 
   if (total_width < work_area.width()) {
     int dx = (work_area.width() - total_width) / 2;
     for (aura::Window::Windows::iterator i = windows_.begin();
          i != windows_.end();
-         i++) {
+         ++i) {
       MoveWindowTo(*i,
                    gfx::Point(work_area.x() + dx, work_area.y()),
                    no_animation != *i);
       dx += (*i)->bounds().width() + kWindowHorizontalMargin;
     }
   } else {
     DCHECK_LT(windows_.size(), 3U);
     // TODO(oshima): Figure out general algorithm to layout more than
     // 2 windows.
     MoveWindowTo(windows_[0], work_area.origin(), no_animation != windows_[0]);
@@ skipping 30 matching lines @@
   else {
     gfx::Rect bounds = window->GetTargetBounds();
     bounds.set_origin(origin);
     if (animate)
       window->layer()->SetAnimation(aura::Window::CreateDefaultAnimation());
     window->SetBounds(bounds);
   }
 }
 
 }  // namespace aura_shell