Revert of Revert of DevTools: Introduce module initializers

Source/devtools/front_end/extensions/ExtensionServer.js

Index: Source/devtools/front_end/extensions/ExtensionServer.js
diff --git a/Source/devtools/front_end/extensions/ExtensionServer.js b/Source/devtools/front_end/extensions/ExtensionServer.js
index 6224ec8dcd677834128309353ab167e358619aa3..317925902a3c723ddc3427d5071d8ebe043dd5ad 100644
--- a/Source/devtools/front_end/extensions/ExtensionServer.js
+++ b/Source/devtools/front_end/extensions/ExtensionServer.js
@@ -28,11 +28,6 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-
-importScript("ExtensionAPI.js");
-importScript("ExtensionRegistryStub.js");
-importScript("ExtensionAuditCategory.js");
-
 /**
  * @constructor
  * @implements {WebInspector.ExtensionServerAPI}
@@ -1100,6 +1095,3 @@
 
 WebInspector.extensionAPI = {};
 defineCommonExtensionSymbols(WebInspector.extensionAPI);
-
-importScript("ExtensionPanel.js");
-importScript("ExtensionView.js");