I'm packing webkitgtk 2.10.0 and I'm having the same problem. There's a lot of affected files:
Source/WebInspectorUI/UserInterface/Controllers/FrameResourceManager.js Source/WebInspectorUI/UserInterface/Controllers/JavaScriptLogViewController.js Source/WebInspectorUI/UserInterface/Controllers/RuntimeManager.js Source/WebInspectorUI/UserInterface/Views/ActivateButtonNavigationItem.js Source/WebInspectorUI/UserInterface/Views/ContentBrowser.js Source/WebInspectorUI/UserInterface/Views/DebuggerSidebarPanel.js Source/WebInspectorUI/UserInterface/Views/LayoutTimelineDataGridNode.js Source/WebInspectorUI/UserInterface/Views/LogContentView.js Source/WebInspectorUI/UserInterface/Views/ReplayDashboardView.js Source/WebInspectorUI/UserInterface/Views/TabBrowser.js Source/WebInspectorUI/UserInterface/External/CodeMirror/clojure.js Source/WebInspectorUI/UserInterface/External/CodeMirror/livescript.js Source/WebInspectorUI/UserInterface/External/CodeMirror/sql.js Source/WebInspectorUI/UserInterface/External/ESLint/eslint.js Source/WebInspectorUI/UserInterface/External/Esprima/esprima.js Source/WebInspectorUI/UserInterface/Protocol/Legacy/6.0/InspectorBackendCommands.js Source/WebInspectorUI/UserInterface/Protocol/Legacy/7.0/InspectorBackendCommands.js Source/WebInspectorUI/UserInterface/Protocol/Legacy/8.0/InspectorBackendCommands.js The source code to all of the is available on github, e.g.: https://github.com/Igalia/webkit/blob/webkit-2.10/Source/WebInspectorUI/UserInterface/Controllers/FrameResourceManager.js Berto
