Remove GrRefCnt.h in favor of SkRefCnt.h

src/gpu/gl/GrGLContext.cpp

Index: src/gpu/gl/GrGLContext.cpp
diff --git a/src/gpu/gl/GrGLContext.cpp b/src/gpu/gl/GrGLContext.cpp
index 1d0a01fc8725c0400eae99d95e4c3b821c97e29f..93f369109ae375bef71f2e0df964e2aa20dab16b 100644
--- a/src/gpu/gl/GrGLContext.cpp
+++ b/src/gpu/gl/GrGLContext.cpp
@@ -73,13 +73,13 @@ GrGLContext::GrGLContext(const GrGLContext& ctx) {
 }
 
 GrGLContext& GrGLContext::operator = (const GrGLContext& ctx) {
-    GrSafeAssign(fInterface, ctx.fInterface);
+    SkRefCnt_SafeAssign(fInterface, ctx.fInterface);
     fInfo = ctx.fInfo;
     return *this;
 }
 
 void GrGLContext::reset() {
-    GrSafeSetNull(fInterface);
+    SkSafeSetNull(fInterface);
     fInfo.reset();
 }