[DevTools] Remove HandlerRegistry.

third_party/WebKit/Source/devtools/front_end/main/module.json

 {
     "extensions": [
         {
             "type": "@Common.AppProvider",
             "className": "Main.SimpleAppProvider",
             "order": 10
         },
         {
             "type": "@UI.ContextMenu.Provider",
             "contextTypes": ["Workspace.UISourceCode", "SDK.Resource", "SDK.NetworkRequest"],
-            "className": "Components.HandlerRegistry.ContextMenuProvider"
+            "className": "Components.Linkifier.ContentProviderContextMenuProvider"
         },
         {
             "type": "@UI.ContextMenu.Provider",
             "contextTypes": ["Node"],
             "className": "UI.ExternaLinkContextMenuProvider"
         },
         {
             "type": "@UI.ContextMenu.Provider",
             "contextTypes": ["Node"],
             "className": "Components.Linkifier.LinkContextMenuProvider"
@@ skipping 280 matching lines @@
             "type": "setting",
             "category": "Appearance",
             "title": "Disable paused state overlay",
             "settingName": "disablePausedStateOverlay",
             "settingType": "boolean",
             "defaultValue": false
         },
         {
             "type": "@UI.SettingUI",
             "category": "Extensions",
-            "className": "Components.HandlerRegistry.OpenAnchorLocationSettingUI"
+            "className": "Components.Linkifier.LinkHandlerSettingUI"
         },
         {
             "type": "@UI.SettingUI",
             "category": "Elements",
             "order": 3,
             "className": "Main.ShowMetricsRulersSettingUI"
         },
         {
             "type": "context-menu-item",
             "location": "mainMenu/navigate",
@@ skipping 41 matching lines @@
         "OverlayController.js",
         "Main.js"
     ],
     "resources": [
         "errorWarningCounter.css",
         "remoteDebuggingTerminatedScreen.css",
         "renderingOptions.css",
         "targetCrashedScreen.css"
     ]
 }