plumb SkInstCnt to all subclasses of GrRefCnt



git-svn-id: http://skia.googlecode.com/svn/trunk@4353 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/SkGpuDevice.cpp b/src/gpu/SkGpuDevice.cpp
index d3ca0b5..c033f01 100644
--- a/src/gpu/SkGpuDevice.cpp
+++ b/src/gpu/SkGpuDevice.cpp
@@ -23,6 +23,8 @@
 #include "SkTLazy.h"
 #include "SkUtils.h"
 
+SK_DEFINE_INST_COUNT(GrTextContext)
+
 #define CACHE_COMPATIBLE_DEVICE_TEXTURES 1
 
 #if 0