Bug 663036 part.2 Implement GetComplex() and SetComplex() in Preferences r=roc

modules/libpref/public/Preferences.h

@@ -174,6 +174,9 @@ public:
   static nsresult GetLocalizedCString(const char* aPref, nsACString* aResult);
   static nsresult GetLocalizedString(const char* aPref, nsAString* aResult);
 
+  static nsresult GetComplex(const char* aPref, const nsIID &aType,
+                             void** aResult);
+
   /**
    * Sets various type pref values.
    */
@@ -188,6 +191,9 @@ public:
   static nsresult SetString(const char* aPref, const PRUnichar* aValue);
   static nsresult SetString(const char* aPref, const nsAString &aValue);
 
+  static nsresult SetComplex(const char* aPref, const nsIID &aType,
+                             nsISupports* aValue);
+
   /**
    * Clears user set pref.
    */

modules/libpref/src/Preferences.cpp

@@ -1252,6 +1252,14 @@ Preferences::GetLocalizedString(const char* aPref, nsAString* aResult)
   return rv;
 }
 
+// static
+nsresult
+Preferences::GetComplex(const char* aPref, const nsIID &aType, void** aResult)
+{
+  NS_ENSURE_TRUE(InitStaticMembers(), NS_ERROR_NOT_AVAILABLE);
+  return sPreferences->mRootBranch->GetComplexValue(aPref, aType, aResult);
+}
+
 // static
 nsresult
 Preferences::SetCString(const char* aPref, const char* aValue)
@@ -1299,6 +1307,15 @@ Preferences::SetInt(const char* aPref, PRInt32 aValue)
   return sPreferences->mRootBranch->SetIntPref(aPref, aValue);
 }
 
+// static
+nsresult
+Preferences::SetComplex(const char* aPref, const nsIID &aType,
+                        nsISupports* aValue)
+{
+  NS_ENSURE_TRUE(InitStaticMembers(), NS_ERROR_NOT_AVAILABLE);
+  return sPreferences->mRootBranch->SetComplexValue(aPref, aType, aValue);
+}
+
 // static
 nsresult
 Preferences::ClearUser(const char* aPref)