Create a visible shelf and constrain window movement

ui/aura_shell/launcher/launcher_view.cc

Index: ui/aura_shell/launcher/launcher_view.cc
diff --git a/ui/aura_shell/launcher/launcher_view.cc b/ui/aura_shell/launcher/launcher_view.cc
index 7847f7712ccf0dfdf661f56875139db9d4d929f3..7be436c9ec89a6050c304d3629c4265276745673 100644
--- a/ui/aura_shell/launcher/launcher_view.cc
+++ b/ui/aura_shell/launcher/launcher_view.cc
@@ -12,18 +12,21 @@
 #include "ui/aura_shell/launcher/tabbed_launcher_button.h"
 #include "ui/aura_shell/launcher/view_model.h"
 #include "ui/aura_shell/launcher/view_model_utils.h"
+#include "ui/aura_shell/shelf_layout_manager.h"
 #include "ui/aura_shell/shell.h"
 #include "ui/aura_shell/shell_delegate.h"
 #include "ui/base/animation/animation.h"
 #include "ui/base/animation/throb_animation.h"
 #include "ui/base/models/simple_menu_model.h"
 #include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/canvas.h"
 #include "ui/gfx/compositor/layer.h"
 #include "ui/gfx/image/image.h"
 #include "ui/views/animation/bounds_animator.h"
 #include "ui/views/controls/button/image_button.h"
 #include "ui/views/controls/menu/menu_model_adapter.h"
 #include "ui/views/controls/menu/menu_runner.h"
+#include "ui/views/painter.h"
 #include "ui/views/widget/widget.h"
 
 using ui::Animation;
@@ -125,6 +128,25 @@ class FadeInAnimationDelegate :
   DISALLOW_COPY_AND_ASSIGN(FadeInAnimationDelegate);
 };
 
+// Used to draw the background of the shelf.
+class ShelfPainter : public views::Painter {
+ public:
+  ShelfPainter() {
+    ResourceBundle& rb = ResourceBundle::GetSharedInstance();
+    image_ = *rb.GetImageNamed(IDR_AURA_LAUNCHER_BACKGROUND).ToSkBitmap();
+  }
+
+  virtual void Paint(int w, int h, gfx::Canvas* canvas) OVERRIDE {
+    canvas->TileImageInt(image_, 0, 0, w, h);
+  }
+
+ private:
+  SkBitmap image_;
+
+  DISALLOW_COPY_AND_ASSIGN(ShelfPainter);
+};
+
+
 }  // namespace
 
 // AnimationDelegate used when inserting a new item. This steadily decreased the
@@ -202,8 +224,12 @@ LauncherView::~LauncherView() {
 }
 
 void LauncherView::Init() {
-  model_->AddObserver(this);
   ResourceBundle& rb = ResourceBundle::GetSharedInstance();
+  model_->AddObserver(this);
+
+  set_background(
+      views::Background::CreateBackgroundPainter(true, new ShelfPainter()));
+
   new_browser_button_ = new views::ImageButton(this);
   int new_browser_button_image_id =
       Shell::GetInstance()->delegate()->GetResourceIDForNewBrowserWindow();