aura-mus: Hook up PerformWindowMove().

ui/views/mus/desktop_window_tree_host_mus.cc

Index: ui/views/mus/desktop_window_tree_host_mus.cc
diff --git a/ui/views/mus/desktop_window_tree_host_mus.cc b/ui/views/mus/desktop_window_tree_host_mus.cc
index 02cf6376934d0bff1123c9b9149b382b160d6280..86fb1142bfff6d5f9043e4cf330f1251e2a7f2f6 100644
--- a/ui/views/mus/desktop_window_tree_host_mus.cc
+++ b/ui/views/mus/desktop_window_tree_host_mus.cc
@@ -5,6 +5,8 @@
 #include "ui/views/mus/desktop_window_tree_host_mus.h"
 
 #include "base/memory/ptr_util.h"
+#include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/client/cursor_client.h"
@@ -168,6 +170,14 @@ class NativeCursorManagerMus : public wm::NativeCursorManager {
 
   DISALLOW_COPY_AND_ASSIGN(NativeCursorManagerMus);
 };
+
+void OnMoveLoopEnd(bool* out_success,
+                   base::Closure quit_closure,
+                   bool in_success) {
+  *out_success = in_success;
+  quit_closure.Run();
+}
+
 }  // namespace
 
 DesktopWindowTreeHostMus::DesktopWindowTreeHostMus(
@@ -583,12 +593,32 @@ Widget::MoveLoopResult DesktopWindowTreeHostMus::RunMoveLoop(
     const gfx::Vector2d& drag_offset,
     Widget::MoveLoopSource source,
     Widget::MoveLoopEscapeBehavior escape_behavior) {
-  NOTIMPLEMENTED();
-  return Widget::MOVE_LOOP_CANCELED;
+  static_cast<internal::NativeWidgetPrivate*>(
+      desktop_native_widget_aura_)->ReleaseCapture();
+
+  base::MessageLoopForUI* loop = base::MessageLoopForUI::current();
+  base::MessageLoop::ScopedNestableTaskAllower allow_nested(loop);
+  base::RunLoop run_loop;
+
+  ui::mojom::MoveLoopSource mus_source =
+      source == Widget::MOVE_LOOP_SOURCE_MOUSE
+          ? ui::mojom::MoveLoopSource::MOUSE
+          : ui::mojom::MoveLoopSource::TOUCH;
+
+  bool success = false;
+  gfx::Point cursor_location =
+      display::Screen::GetScreen()->GetCursorScreenPoint();
+  WindowTreeHostMus::PerformWindowMove(
+      mus_source, cursor_location,
+      base::Bind(OnMoveLoopEnd, &success, run_loop.QuitClosure()));
+
+  run_loop.Run();
+
+  return success ? Widget::MOVE_LOOP_SUCCESSFUL : Widget::MOVE_LOOP_CANCELED;
 }
 
 void DesktopWindowTreeHostMus::EndMoveLoop() {
-  NOTIMPLEMENTED();
+  WindowTreeHostMus::CancelWindowMove();
 }
 
 void DesktopWindowTreeHostMus::SetVisibilityChangedAnimationsEnabled(