DevTools: Add JSDoc for static methods, fix JSDoc types and induced errors

Source/devtools/front_end/components/InspectElementModeController.js

Index: Source/devtools/front_end/components/InspectElementModeController.js
diff --git a/Source/devtools/front_end/components/InspectElementModeController.js b/Source/devtools/front_end/components/InspectElementModeController.js
index 6af6f9ba76f73be1fde972a9fa57ec7c8567cc8f..02146f17778ff8b6e5df2bed75058022b5569e47 100644
--- a/Source/devtools/front_end/components/InspectElementModeController.js
+++ b/Source/devtools/front_end/components/InspectElementModeController.js
@@ -35,6 +35,9 @@ WebInspector.InspectElementModeController = function()
     this._shortcut = WebInspector.InspectElementModeController.createShortcut();
 }
 
+/**
+ * @return {!WebInspector.KeyboardShortcut.Descriptor}
+ */
 WebInspector.InspectElementModeController.createShortcut = function()
 {
     return WebInspector.KeyboardShortcut.makeDescriptor("c", WebInspector.KeyboardShortcut.Modifiers.CtrlOrMeta | WebInspector.KeyboardShortcut.Modifiers.Shift);