Do not automatically maximize the window if the maximized bounds can be controlled by the client.

ash/common/wm/maximize_mode/maximize_mode_window_manager.cc

Index: ash/common/wm/maximize_mode/maximize_mode_window_manager.cc
diff --git a/ash/common/wm/maximize_mode/maximize_mode_window_manager.cc b/ash/common/wm/maximize_mode/maximize_mode_window_manager.cc
index bb97c7d6620c0839f2e64afb25d3b5ea3efe000a..3d0ea92f86cd16b0851dfe9ccc992063b9df4116 100644
--- a/ash/common/wm/maximize_mode/maximize_mode_window_manager.cc
+++ b/ash/common/wm/maximize_mode/maximize_mode_window_manager.cc
@@ -228,6 +228,11 @@ bool MaximizeModeWindowManager::ShouldHandleWindow(WmWindow* window) {
   if (window->GetWindowState()->IsDocked())
     return false;
 
+  // If the changing bounds in the maximized/fullscreen is allowed, then
+  // let the client manage it even in maximized mode.
+  if (window->GetWindowState()->allow_set_bounds_in_maximized())
+    return false;
+
   return window->GetType() == ui::wm::WINDOW_TYPE_NORMAL;
 }