[DevTools] Add interstitial events to Inspector domain.

Source/devtools/protocol.json

Index: Source/devtools/protocol.json
diff --git a/Source/devtools/protocol.json b/Source/devtools/protocol.json
index 9a82561422cffb1354b91694406a21950904ef2d..02729b3488c0e114f2c4c64bcc6751c09076c8b4 100644
--- a/Source/devtools/protocol.json
+++ b/Source/devtools/protocol.json
@@ -45,6 +45,16 @@
                 "name": "targetCrashed",
                 "description": "Fired when debugging target has crashed",
                 "handlers": ["browser"]
+            },
+            {
+                "name": "interstitialShown",

[eustas, 2014/08/21 05:54:38]

/usr/local/google/home/eustas/clients/chrome/src/third_party/WebKit/Source/devtools/front_end/main/Main.js:36:
WARNING - property interstitialHidden on interface InspectorAgent.Dispatcher is
not implemented by type WebInspector.Main
WebInspector.Main = function()
                    ^

/usr/local/google/home/eustas/clients/chrome/src/third_party/WebKit/Source/devtools/front_end/main/Main.js:36:
WARNING - property interstitialShown on interface InspectorAgent.Dispatcher is
not implemented by type WebInspector.Main
WebInspector.Main = function()
                    ^

+                "description": "Fired when interstitial page was shown",
+                "handlers": ["browser"]
+            },
+            {
+                "name": "interstitialHidden",
+                "description": "Fired when interstitial page was hidden",
+                "handlers": ["browser"]
             }
         ]
     },