Adds the option of aligning the launcher to the left or right. There

ash/shell.cc

Index: ash/shell.cc
diff --git a/ash/shell.cc b/ash/shell.cc
index f5d3edfbc7b546deae690cacd2e7a10f0d8dc478..d58196dfa72436872f46f9300748482273e57381 100644
--- a/ash/shell.cc
+++ b/ash/shell.cc
@@ -880,6 +880,14 @@ ShelfAutoHideBehavior Shell::GetShelfAutoHideBehavior() const {
   return shelf_->auto_hide_behavior();
 }
 
+void Shell::SetShelfAlignment(ShelfAlignment alignment) {
+  shelf_->SetAlignment(alignment);
+}
+
+ShelfAlignment Shell::GetShelfAlignment() {
+  return shelf_->alignment();
+}
+
 int Shell::GetGridSize() const {
   return workspace_controller_->workspace_manager()->grid_size();
 }