Remove GrRefCnt.h in favor of SkRefCnt.h

src/gpu/GrGpu.cpp

Index: src/gpu/GrGpu.cpp
diff --git a/src/gpu/GrGpu.cpp b/src/gpu/GrGpu.cpp
index adcc3a301778f5b9e3f0672da73b539a00dcbf18..a4aa00eac12b53406a4cf0a02a82438c84743769 100644
--- a/src/gpu/GrGpu.cpp
+++ b/src/gpu/GrGpu.cpp
@@ -66,7 +66,7 @@ void GrGpu::abandonResources() {
     }
 
     SkASSERT(NULL == fQuadIndexBuffer || !fQuadIndexBuffer->isValid());
-    GrSafeSetNull(fQuadIndexBuffer);
+    SkSafeSetNull(fQuadIndexBuffer);
     delete fVertexPool;
     fVertexPool = NULL;
     delete fIndexPool;
@@ -82,7 +82,7 @@ void GrGpu::releaseResources() {
     }
 
     SkASSERT(NULL == fQuadIndexBuffer || !fQuadIndexBuffer->isValid());
-    GrSafeSetNull(fQuadIndexBuffer);
+    SkSafeSetNull(fQuadIndexBuffer);
     delete fVertexPool;
     fVertexPool = NULL;
     delete fIndexPool;