Use the correct launcher assets for shelf alignment.

ash/launcher/launcher_button.h

Index: ash/launcher/launcher_button.h
diff --git a/ash/launcher/launcher_button.h b/ash/launcher/launcher_button.h
index c46b20978d4d3692916053b5ce7492bf08b4cdfe..934fc9a19962dc3d46d5fe277d17e06ed9a450d2 100644
--- a/ash/launcher/launcher_button.h
+++ b/ash/launcher/launcher_button.h
@@ -13,6 +13,7 @@ namespace ash {
 namespace internal {
 
 class LauncherButtonHost;
+class ShelfLayoutManager;
 
 // Button used for items on the launcher, except for the AppList.
 class LauncherButton : public views::CustomButton {
@@ -38,7 +39,8 @@ class LauncherButton : public views::CustomButton {
 
   // Called to create an instance of a LauncherButton.
   static LauncherButton* Create(views::ButtonListener* listener,
-                                LauncherButtonHost* host);
+                                LauncherButtonHost* host,
+                                ShelfLayoutManager* shelf_layout_manager);
 
   // Sets the image to display for this entry.
   void SetImage(const gfx::ImageSkia& image);
@@ -52,7 +54,9 @@ class LauncherButton : public views::CustomButton {
   gfx::Rect GetIconBounds() const;
 
  protected:
-  LauncherButton(views::ButtonListener* listener, LauncherButtonHost* host);
+  LauncherButton(views::ButtonListener* listener,
+                 LauncherButtonHost* host,
+                 ShelfLayoutManager* shelf_layout_manager);
 
   // Class that draws the icon part of a button, so it can be animated
   // independently of the rest. This can be subclassed to provide a custom
@@ -121,6 +125,8 @@ class LauncherButton : public views::CustomButton {
   // together.
   int state_;
 
+  ShelfLayoutManager* shelf_layout_manager_;
+
   gfx::ShadowValues icon_shadows_;
 
   DISALLOW_COPY_AND_ASSIGN(LauncherButton);