Bug 1137151: Marked destructors of refcounted FM-radio classes as protected, r=pzhang

dom/fmradio/FMRadio.cpp

@@ -60,8 +60,6 @@ public:
     mType = aType;
   }
 
-  ~FMRadioRequest() { }
-
   NS_IMETHODIMP
   Run()
   {
@@ -97,6 +95,9 @@ public:
     return NS_OK;
   }
 
+protected:
+  ~FMRadioRequest() { }
+
 private:
   FMRadioRequestArgs::Type mType;
   nsWeakPtr mFMRadio;

dom/fmradio/FMRadioService.cpp

@@ -238,6 +238,9 @@ public:
     return NS_OK;
   }
 
+protected:
+  ~ReadAirplaneModeSettingTask() {}
+
 private:
   nsRefPtr<FMRadioReplyRunnable> mPendingRequest;
 };

dom/fmradio/FMRadioService.h

@@ -159,7 +159,6 @@ class FMRadioService MOZ_FINAL : public IFMRadioService
 
 public:
   static FMRadioService* Singleton();
-  virtual ~FMRadioService();
 
   NS_DECL_ISUPPORTS
 
@@ -201,6 +200,7 @@ public:
 
 protected:
   FMRadioService();
+  virtual ~FMRadioService();
 
 private:
   int32_t RoundFrequency(double aFrequencyInMHz);