DevTools: Implement extension-based status bar buttons

Source/devtools/front_end/components/module.json

Index: Source/devtools/front_end/components/module.json
diff --git a/Source/devtools/front_end/components/module.json b/Source/devtools/front_end/components/module.json
index a4cc206921d3ccd8db9b77bf55913bf866d808b8..e864f67ffe593247a20157572ee94b4d96e1ff89 100644
--- a/Source/devtools/front_end/components/module.json
+++ b/Source/devtools/front_end/components/module.json
@@ -4,6 +4,17 @@
             "type": "@WebInspector.ContextMenu.Provider",
             "contextTypes": ["WebInspector.UISourceCode", "WebInspector.Resource", "WebInspector.NetworkRequest", "Node"],
             "className": "WebInspector.HandlerRegistry.ContextMenuProvider"
+        },
+        {
+            "type": "@WebInspector.StatusBarButton.Provider",
+            "className": "WebInspector.InspectElementModeController.ToggleButtonProvider",
+            "location": "toolbar-left",
+            "actionId": "main.toggle-element-search"
+        },
+        {
+            "type": "@WebInspector.StatusBarButton.Provider",
+            "className": "WebInspector.DockController.ButtonProvider",
+            "location": "toolbar-right"
         }
     ]
 }