Relands fixes for 106432, 107287 and 107401. These got reverted

ui/aura_shell/shelf_layout_manager.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/shelf_layout_manager.h"
 
 #include "base/auto_reset.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/screen_aura.h"
 #include "ui/gfx/compositor/layer.h"
@@ skipping 104 matching lines @@
   const gfx::Rect& available_bounds(aura::RootWindow::GetInstance()->bounds());
   int y = available_bounds.bottom() - (visible ? max_height_ : 0);
   gfx::Rect status_bounds(status_->GetWindowScreenBounds());
   target_bounds->status_bounds = gfx::Rect(
       available_bounds.right() - status_bounds.width(),
       y + (max_height_ - status_bounds.height()) / 2,
       status_bounds.width(), status_bounds.height());
   gfx::Rect launcher_bounds(launcher_->GetWindowScreenBounds());
   target_bounds->launcher_bounds = gfx::Rect(
       available_bounds.x(), y + (max_height_ - launcher_bounds.height()) / 2,
-      available_bounds.width() - status_bounds.width(),
+      available_bounds.width(),
       launcher_bounds.height());
   if (visible)
     target_bounds->work_area_insets = gfx::Insets(0, 0, max_height_, 0);
 }
 
 void ShelfLayoutManager::AnimateWidgetTo(views::Widget* widget,
                                          const gfx::Rect& target_bounds,
                                          float target_opacity) {
   ui::Layer* layer = GetLayer(widget);
   ui::LayerAnimator::ScopedSettings animation_setter(layer->GetAnimator());
@@ skipping 10 matching lines @@
   animating_ = false;
   visible_ = !visible_;
   TargetBounds target_bounds;
   CalculateTargetBounds(visible_, &target_bounds);
   aura::RootWindow::GetInstance()->screen()->set_work_area_insets(
       target_bounds.work_area_insets);
 }
 
 }  // internal
 }  // aura_shell