Bug 1366502 - Make sure the RenderTextureHost is released in render thread. r=sotaro.

The RenderTextureHost might calls some thread-specific functions(e.g. OpenGL calls) in ~RenderTextureHost(). Add a checking here to prevent this problem.

MozReview-Commit-ID: 62QlavmXOig

gfx/webrender_bindings/RenderTextureHost.cpp

@@ -4,6 +4,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #include "RenderTextureHost.h"
+#include "RenderThread.h"
 
 namespace mozilla {
 namespace wr {
@@ -15,6 +16,7 @@ RenderTextureHost::RenderTextureHost()
 
 RenderTextureHost::~RenderTextureHost()
 {
+  MOZ_ASSERT(RenderThread::IsInRenderThread());
   MOZ_COUNT_DTOR(RenderTextureHost);
 }