platform/platform-resources/src/componentSets/WindowManagement.xml

<components>
  <application-components>
    <component>
      <interface-class>com.intellij.openapi.wm.WindowManager</interface-class>
      <implementation-class>com.intellij.openapi.wm.impl.WindowManagerImpl</implementation-class>
      <headless-implementation-class>com.intellij.openapi.wm.impl.TestWindowManager</headless-implementation-class>
    </component>
  </application-components>

  <project-components>
    <component>
      <interface-class>com.intellij.openapi.wm.ToolWindowManager</interface-class>
      <implementation-class>com.intellij.openapi.wm.impl.ToolWindowManagerImpl</implementation-class>
      <headless-implementation-class>com.intellij.openapi.wm.impl.ToolWindowHeadlessManagerImpl</headless-implementation-class>
      <option name="workspace" value="true"/>
    </component>
    <component>
      <interface-class>com.intellij.openapi.wm.IdeFocusManager</interface-class>
      <implementation-class>com.intellij.openapi.wm.impl.IdeFocusManagerImpl</implementation-class>
      <headless-implementation-class>com.intellij.openapi.wm.impl.IdeFocusManagerHeadless</headless-implementation-class>
    </component>
    <component>
      <implementation-class>com.intellij.openapi.wm.impl.WindowDressing</implementation-class>
      <skipForDefaultProject/>
    </component>
    <component>
      <implementation-class>com.intellij.openapi.wm.impl.LibraryDependentToolWindowManager</implementation-class>
      <skipForDefaultProject/>
    </component>
  </project-components>
</components>