Prevent maximize/minimize/fullscreen-ize window in trusted pinned mode.

ash/common/wm/maximize_mode/maximize_mode_window_state.cc

Index: ash/common/wm/maximize_mode/maximize_mode_window_state.cc
diff --git a/ash/common/wm/maximize_mode/maximize_mode_window_state.cc b/ash/common/wm/maximize_mode/maximize_mode_window_state.cc
index fc240bb71a2dcac5f63c4697ddb91d0dd40efde3..60053fcd39c860d0763312a5f277a7c5ac1f74a4 100644
--- a/ash/common/wm/maximize_mode/maximize_mode_window_state.cc
+++ b/ash/common/wm/maximize_mode/maximize_mode_window_state.cc
@@ -133,9 +133,13 @@ void MaximizeModeWindowState::OnWMEvent(wm::WindowState* window_state,
                                         const wm::WMEvent* event) {
   switch (event->type()) {
     case wm::WM_EVENT_TOGGLE_FULLSCREEN:
+      if (window_state->IsTrustedPinned())
+        return;

[oshima, 2016/12/21 01:38:58]

FYI: ARC windows are no longer using this class. We may want to remove pin code,
and add assert to prevent using pinned, unless we want to use PINn'ed state for
cros windows.

[hidehiko, 2016/12/21 06:57:30]

Thanks, so reverted this file.
Let's address removing pinned code from this file separately.

       ToggleFullScreen(window_state, window_state->delegate());
       break;
     case wm::WM_EVENT_FULLSCREEN:
+      if (window_state->IsTrustedPinned())
+        return;
       UpdateWindow(window_state, wm::WINDOW_STATE_TYPE_FULLSCREEN, true);
       break;
     case wm::WM_EVENT_PIN:
@@ -150,18 +154,23 @@ void MaximizeModeWindowState::OnWMEvent(wm::WindowState* window_state,
     case wm::WM_EVENT_TOGGLE_VERTICAL_MAXIMIZE:
     case wm::WM_EVENT_TOGGLE_HORIZONTAL_MAXIMIZE:
     case wm::WM_EVENT_TOGGLE_MAXIMIZE:
+    case wm::WM_EVENT_MAXIMIZE:
+      if (window_state->IsTrustedPinned())
+        return;
+    // Fall through.
     case wm::WM_EVENT_CYCLE_SNAP_DOCK_LEFT:
     case wm::WM_EVENT_CYCLE_SNAP_DOCK_RIGHT:
     case wm::WM_EVENT_CENTER:
     case wm::WM_EVENT_SNAP_LEFT:
     case wm::WM_EVENT_SNAP_RIGHT:
     case wm::WM_EVENT_NORMAL:
-    case wm::WM_EVENT_MAXIMIZE:
     case wm::WM_EVENT_DOCK:
       UpdateWindow(window_state, GetMaximizedOrCenteredWindowType(window_state),
                    true);
       return;
     case wm::WM_EVENT_MINIMIZE:
+      if (window_state->IsTrustedPinned())
+        return;
       UpdateWindow(window_state, wm::WINDOW_STATE_TYPE_MINIMIZED, true);
       return;
     case wm::WM_EVENT_SHOW_INACTIVE: