Drag and rotate windows

ui/aura_shell/workspace/workspace_manager.cc

Index: ui/aura_shell/workspace/workspace_manager.cc
diff --git a/ui/aura_shell/workspace/workspace_manager.cc b/ui/aura_shell/workspace/workspace_manager.cc
index 410ace11474528ced8138181083bd90fb09c7f42..dd6bbe4dae1cb1e80ad5864e48b7e34f47e559f4 100644
--- a/ui/aura_shell/workspace/workspace_manager.cc
+++ b/ui/aura_shell/workspace/workspace_manager.cc
@@ -69,6 +69,18 @@ Workspace* WorkspaceManager::FindBy(aura::Window* window) const {
   return NULL;
 }
 
+aura::Window* WorkspaceManager::FindSwapWindowForLocation(
+    const gfx::Point& point) {
+  for (Workspaces::const_iterator i = workspaces_.begin();
+       i != workspaces_.end();
+       ++i) {
+    aura::Window* window = (*i)->FindSwapWindowForLocation(point);
+    if (window)
+      return window;
+  }
+  return NULL;
+}
+
 void WorkspaceManager::LayoutWorkspaces() {
   UpdateViewport();
 
@@ -121,6 +133,19 @@ void WorkspaceManager::SetOverview(bool overview) {
   viewport_->layer()->SetTransform(transform);
 }
 
+void WorkspaceManager::SwapWindow(aura::Window* drag, aura::Window* target) {
+  Workspace* source_ws = FindBy(drag);
+  Workspace* target_ws = FindBy(target);
+  DCHECK(source_ws);
+  DCHECK(target_ws);
+  if (source_ws == target_ws) {
+    source_ws->SwapWindow(drag, target);
+  } else {
+    source_ws->ReplaceWindow(drag, target, true);
+    target_ws->ReplaceWindow(target, drag, false);
+  }
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // WorkspaceManager, Overridden from aura::DesktopObserver: