Bug 1048104 - Add GMPMutex::Destroy(). r=jesup

content/media/gmp/GMPPlatform.cpp

@@ -203,10 +203,18 @@ GMPThreadImpl::Join()
 GMPMutexImpl::GMPMutexImpl()
 : mMutex("gmp-mutex")
 {
+  MOZ_COUNT_CTOR(GMPMutexImpl);
 }
 
 GMPMutexImpl::~GMPMutexImpl()
 {
+  MOZ_COUNT_DTOR(GMPMutexImpl);
+}
+
+void
+GMPMutexImpl::Destroy()
+{
+  delete this;
 }
 
 void

content/media/gmp/GMPPlatform.h

@@ -41,6 +41,7 @@ public:
   // GMPMutex
   virtual void Acquire() MOZ_OVERRIDE;
   virtual void Release() MOZ_OVERRIDE;
+  virtual void Destroy() MOZ_OVERRIDE;
 
 private:
   Mutex mMutex;

content/media/gmp/gmp-api/gmp-platform.h

@@ -41,7 +41,7 @@
 
 class GMPTask {
 public:
-  virtual void Destroy() = 0;
+  virtual void Destroy() = 0; // Deletes object.
   virtual ~GMPTask() {}
   virtual void Run() = 0;
 };
@@ -50,7 +50,7 @@ class GMPThread {
 public:
   virtual ~GMPThread() {}
   virtual void Post(GMPTask* aTask) = 0;
-  virtual void Join() = 0; // Deletes GMPThread!
+  virtual void Join() = 0; // Deletes object after join completes.
 };
 
 class GMPMutex {
@@ -58,6 +58,7 @@ public:
   virtual ~GMPMutex() {}
   virtual void Acquire() = 0;
   virtual void Release() = 0;
+  virtual void Destroy() = 0; // Deletes object.
 };
 
 // Time is defined as the number of milliseconds since the