Bug 1211204 - Remove possible false-negative with D3D9 texture memory reporting. r=mattwoodrow

gfx/layers/d3d9/TextureD3D9.cpp

@@ -670,6 +670,9 @@ SharedTextureClientD3D9::SharedTextureClientD3D9(ISurfaceAllocator* aAllocator,
 SharedTextureClientD3D9::~SharedTextureClientD3D9()
 {
   MOZ_COUNT_DTOR(SharedTextureClientD3D9);
+  if (mTexture) {
+    gfxWindowsPlatform::sD3D9SharedTextureUsed -= mDesc.Width * mDesc.Height * 4;
+  }
 }
 
 void
@@ -678,9 +681,6 @@ SharedTextureClientD3D9::FinalizeOnIPDLThread()
   if (mTexture && mActor) {
     KeepUntilFullDeallocation(MakeUnique<TKeepAlive<IDirect3DTexture9>>(mTexture));
   }
-  if (mTexture) {
-    gfxWindowsPlatform::sD3D9SharedTextureUsed -= mDesc.Width * mDesc.Height * 4;
-  }
 }
 
 // static