blink: permissions: add plumbing to revoke permissions

Source/modules/permissions/Permissions.h

Index: Source/modules/permissions/Permissions.h
diff --git a/Source/modules/permissions/Permissions.h b/Source/modules/permissions/Permissions.h
index c7c1c4c5e095b32fc29f1f24c2f8f8bd8d8d9bb7..c4928001b7dc960d8bc345a4109273e9ee23b9cd 100644
--- a/Source/modules/permissions/Permissions.h
+++ b/Source/modules/permissions/Permissions.h
@@ -8,6 +8,7 @@
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "platform/heap/Handle.h"
+#include "public/platform/modules/permissions/WebPermissionType.h"
 
 namespace blink {
 
@@ -22,6 +23,10 @@ public:
     DEFINE_INLINE_TRACE() { }
 
     ScriptPromise query(ScriptState*, const ScriptValue&);
+    ScriptPromise revoke(ScriptState*, const ScriptValue&);
+
+private:
+    WebPermissionType convertPermissionStringToType(const String& name);

[mlamouri (slow - plz ping), 2015/07/17 13:16:18]

Could you have this method in an anonymous namespace inside the cpp file? It
doesn't need to be exposed outside of Permissions and isn't using |this|.

[Lalit Maganti, 2015/07/17 13:47:35]

Done.

 };
 
 } // namespace blink