Bug 677166 - Part 5 - Use a pref for connection.metered. r=sicking

dom/network/interfaces/nsIDOMConnection.idl

@@ -39,4 +39,5 @@
 [scriptable, uuid(0bd0bcc8-ca92-43fa-97bd-aec8d79edb24)]
 interface nsIDOMMozConnection : nsISupports
 {
+  readonly attribute boolean metered;
 };

dom/network/src/Connection.cpp

@@ -37,6 +37,7 @@
 
 #include "Connection.h"
 #include "nsIDOMClassInfo.h"
+#include "mozilla/Preferences.h"
 
 DOMCI_DATA(MozConnection, mozilla::dom::network::Connection)
 
@@ -44,6 +45,9 @@ namespace mozilla {
 namespace dom {
 namespace network {
 
+const char* Connection::sMeteredPrefName     = "dom.network.metered";
+const bool  Connection::sMeteredDefaultValue = false;
+
 NS_INTERFACE_MAP_BEGIN(Connection)
   NS_INTERFACE_MAP_ENTRY(nsIDOMMozConnection)
   NS_INTERFACE_MAP_ENTRY(nsISupports)
@@ -53,6 +57,14 @@ NS_INTERFACE_MAP_END
 NS_IMPL_ADDREF(Connection)
 NS_IMPL_RELEASE(Connection)
 
+NS_IMETHODIMP
+Connection::GetMetered(bool* aMetered)
+{
+  *aMetered = Preferences::GetBool(sMeteredPrefName,
+                                   sMeteredDefaultValue);
+  return NS_OK;
+}
+
 } // namespace network
 } // namespace dom
 } // namespace mozilla

dom/network/src/Connection.h

@@ -49,6 +49,10 @@ class Connection : public nsIDOMMozConnection
 public:
   NS_DECL_ISUPPORTS
   NS_DECL_NSIDOMMOZCONNECTION
+
+private:
+  static const char* sMeteredPrefName;
+  static const bool  sMeteredDefaultValue;
 };
 
 } // namespace network

modules/libpref/src/init/all.js

@@ -3416,6 +3416,7 @@ pref("profiler.entries", 100000);
 
 // Network API
 pref("dom.network.enabled", true);
+pref("dom.network.metered", false);
 #ifdef XP_WIN
 // On 32-bit Windows, fire a low-memory notification if we have less than this
 // many mb of virtual address space available.