Bug 969898: Make gfx/heap-textures memory reporter support 64-bit numbers on 64-bit platforms. r=njn

gfx/layers/ipc/ISurfaceAllocator.cpp

@@ -30,7 +30,7 @@ namespace layers {
 
 NS_IMPL_ISUPPORTS1(GfxMemoryImageReporter, nsIMemoryReporter)
 
-mozilla::Atomic<int32_t> GfxMemoryImageReporter::sAmount(0);
+mozilla::Atomic<size_t> GfxMemoryImageReporter::sAmount(0);
 
 mozilla::ipc::SharedMemory::SharedMemoryType OptimalShmemType()
 {

gfx/layers/ipc/ISurfaceAllocator.h

@@ -183,7 +183,7 @@ public:
   }
 
 private:
-  static mozilla::Atomic<int32_t> sAmount;
+  static mozilla::Atomic<size_t> sAmount;
 };
 
 } // namespace