[Reland][Extensions Bindings] Add support for filtered events

extensions/common/event_filtering_info.cc

Index: extensions/common/event_filtering_info.cc
diff --git a/extensions/common/event_filtering_info.cc b/extensions/common/event_filtering_info.cc
index 4770d9e95227a951ef3ef9b0de41926115a5b69c..b8040e9c2cd9dcc1e748452a9af3dd62d719652c 100644
--- a/extensions/common/event_filtering_info.cc
+++ b/extensions/common/event_filtering_info.cc
@@ -12,6 +12,15 @@
 
 namespace extensions {
 
+namespace {
+
+const char kInstanceId[] = "instanceId";
+const char kServiceType[] = "serviceType";
+const char kWindowType[] = "windowType";
+const char kWindowExposedByDefault[] = "windowExposedByDefault";
+
+}
+
 EventFilteringInfo::EventFilteringInfo()
     : has_url_(false),
       has_instance_id_(false),
@@ -19,6 +28,24 @@ EventFilteringInfo::EventFilteringInfo()
       has_window_type_(false),
       has_window_exposed_by_default_(false) {}
 
+EventFilteringInfo::EventFilteringInfo(const base::DictionaryValue& dict)
+    : EventFilteringInfo() {
+  std::string url;
+  if (dict.GetString("url", &url)) {
+    GURL maybe_url(url);
+    if (maybe_url.is_valid()) {
+      has_url_ = true;
+      url_.Swap(&maybe_url);
+    }
+  }
+
+  has_instance_id_ = dict.GetInteger(kInstanceId, &instance_id_);
+  dict.GetString(kServiceType, &service_type_);
+  has_window_type_ = dict.GetString(kWindowType, &window_type_);
+  has_window_exposed_by_default_ =
+      dict.GetBoolean(kWindowExposedByDefault, &window_exposed_by_default_);
+}
+
 EventFilteringInfo::EventFilteringInfo(const EventFilteringInfo& other) =
     default;
 
@@ -51,16 +78,16 @@ std::unique_ptr<base::DictionaryValue> EventFilteringInfo::AsValue() const {
     result->SetString("url", url_.spec());
 
   if (has_instance_id_)
-    result->SetInteger("instanceId", instance_id_);
+    result->SetInteger(kInstanceId, instance_id_);
 
   if (!service_type_.empty())
-    result->SetString("serviceType", service_type_);
+    result->SetString(kServiceType, service_type_);
 
   if (has_window_type_)
-    result->SetString("windowType", window_type_);
+    result->SetString(kWindowType, window_type_);
 
   if (has_window_exposed_by_default_)
-    result->SetBoolean("windowExposedByDefault", window_exposed_by_default_);
+    result->SetBoolean(kWindowExposedByDefault, window_exposed_by_default_);
 
   return result;
 }