Revert of Revert of DevTools: Introduce module initializers

Source/devtools/front_end/sources/_module.js

Index: Source/devtools/front_end/sources/_module.js
diff --git a/Source/devtools/front_end/sources/_module.js b/Source/devtools/front_end/sources/_module.js
new file mode 100644
index 0000000000000000000000000000000000000000..5c6ec67026f6180874aff00f2dde23347f12ede6
--- /dev/null
+++ b/Source/devtools/front_end/sources/_module.js
@@ -0,0 +1,36 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+importScript("jsdifflib.js")
+importScript("Placard.js");
+importScript("AddSourceMapURLDialog.js");
+importScript("BreakpointsSidebarPane.js");
+importScript("CallStackSidebarPane.js");
+importScript("SimpleHistoryManager.js");
+importScript("EditingLocationHistoryManager.js");
+importScript("FilePathScoreFunction.js");
+importScript("FilteredItemSelectionDialog.js");
+importScript("UISourceCodeFrame.js");
+importScript("JavaScriptSourceFrame.js");
+importScript("CSSSourceFrame.js");
+importScript("NavigatorView.js");
+importScript("RevisionHistoryView.js");
+importScript("ScopeChainSidebarPane.js");
+importScript("SourcesNavigator.js");
+importScript("StyleSheetOutlineDialog.js");
+importScript("TabbedEditorContainer.js");
+importScript("WatchExpressionsSidebarPane.js");
+importScript("WorkersSidebarPane.js");
+importScript("ThreadsSidebarPane.js");
+importScript("ScriptFormatterEditorAction.js");
+importScript("InplaceFormatterEditorAction.js");
+importScript("ScriptFormatter.js");
+importScript("SourcesView.js");
+
+// Search results pane
+importScript("AdvancedSearchView.js");
+importScript("FileBasedSearchResultsPane.js");
+importScript("SourcesSearchScope.js");
+
+importScript("SourcesPanel.js");