Devtools UI: Fix Chrome focus shortcut and add pause debugger shortcut

Source/devtools/front_end/console/module.json

 {
     "extensions": [
         {
             "type": "@WebInspector.PanelFactory",
             "name": "console",
             "title": "Console",
             "order": 20,
             "className": "WebInspector.ConsolePanelFactory"
         },
         {
@@ skipping 19 matching lines @@
             ]
         },
         {
             "type": "@WebInspector.ActionDelegate",
             "actionId": "console.clear",
             "title": "Clear console",
             "iconClass": "clear-toolbar-item",
             "className": "WebInspector.ConsoleView.ActionDelegate",
             "bindings": [
                 {
-                    "platform": "windows,linux",
                     "shortcut": "Ctrl+L"
-                },
-                {
-                    "platform": "mac",
-                    "shortcut": "Ctrl+L Meta+L"

[pfeldman, 2015/09/02 02:39:22]

Cmd + K used to clear console on Mac.

[samli, 2015/09/02 19:07:48]

Done.

                 }
             ]
         },
         {
             "type": "setting",
             "category": "Console",
             "title": "Hide network messages",
             "settingName": "hideNetworkMessages",
             "settingType": "boolean",
             "defaultValue": false
@@ skipping 28 matching lines @@
     ],
     "scripts": [
         "ConsoleViewMessage.js",
         "ConsoleView.js",
         "ConsolePanel.js"
     ],
     "resources": [
         "consoleView.css"
     ]
 }