Do not allow window dragging/resizing in oobe or login screen.

Bug: 1066467
Change-Id: I23114012b994684004a5553fea74f31795030bd9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2144841Reviewed-by: Sammie Quon <sammiequon@chromium.org>
Commit-Queue: Xiaoqian Dai <xdai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#758419}

ash/wm/workspace/workspace_window_resizer.cc

@@ -290,9 +290,15 @@ std::unique_ptr<WindowResizer> CreateWindowResizer(
   if (window_state->drag_details())
     return nullptr;
 
-  // When running in single app mode, we should not create window resizer.
-  if (Shell::Get()->session_controller()->IsRunningInAppMode())
+  // When running in single app mode or not in an active user session, we
+  // should not create window resizer.
+  SessionControllerImpl* session_controller =
+      Shell::Get()->session_controller();
+  if (session_controller->IsRunningInAppMode() ||
+      session_controller->GetSessionState() !=
+          session_manager::SessionState::ACTIVE) {
     return nullptr;
+  }
 
   if (window_state->IsPip()) {
     window_state->CreateDragDetails(point_in_parent, window_component, source);

ash/wm/workspace/workspace_window_resizer_unittest.cc

@@ -1951,4 +1951,22 @@ TEST_F(WorkspaceWindowResizerTest, DoesNotWorkInAppMode) {
   EXPECT_FALSE(CreateResizerForTest(window_.get(), gfx::Point(), HTCAPTION));
 }
 
+TEST_F(WorkspaceWindowResizerTest, DoNotCreateResizerIfNotActiveSession) {
+  GetSessionControllerClient()->SetSessionState(
+      session_manager::SessionState::OOBE);
+  EXPECT_FALSE(CreateResizerForTest(window_.get(), gfx::Point(), HTCAPTION));
+
+  GetSessionControllerClient()->SetSessionState(
+      session_manager::SessionState::LOCKED);
+  EXPECT_FALSE(CreateResizerForTest(window_.get(), gfx::Point(), HTCAPTION));
+
+  GetSessionControllerClient()->SetSessionState(
+      session_manager::SessionState::LOGIN_PRIMARY);
+  EXPECT_FALSE(CreateResizerForTest(window_.get(), gfx::Point(), HTCAPTION));
+
+  GetSessionControllerClient()->SetSessionState(
+      session_manager::SessionState::ACTIVE);
+  EXPECT_TRUE(CreateResizerForTest(window_.get(), gfx::Point(), HTCAPTION));
+}
+
 }  // namespace ash