Timeline: do not start timeline on regular page reloads

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

 {
     "extensions": [
         {
             "type": "view",
             "location": "drawer-view",
             "id": "coverage",
             "title": "Coverage",
             "persistence": "closeable",
             "className": "Coverage.CoverageView",
             "order": 100
@@ skipping 21 matching lines @@
                     "title": "Stop instrumenting coverage and show results"
                 }
             ]
         },
         {
             "type": "@UI.ActionDelegate",
             "actionId": "coverage.start-with-reload",
             "iconClass": "largeicon-refresh",
             "className": "Coverage.CoverageView.ActionDelegate",
             "category": "Performance",
-            "title": "Start recording and reload page"
+            "title": "Start instrumenting coverage and reload page"
         }
     ],
     "dependencies": [
         "sdk",
         "ui",
         "source_frame",
         "sources",
         "data_grid"
     ],
     "scripts": [
         "CoverageModel.js",
         "CoverageListView.js",
         "CoverageView.js",
         "CoverageDecorationManager.js"
     ],
     "resources": [
         "coverageListView.css",
         "coverageView.css"
     ]
 }