rolling back the experimental rollbacks in r2178-2179

git-svn-id: http://skia.googlecode.com/svn/trunk@2180 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu/src/GrBinHashKey.h b/gpu/src/GrBinHashKey.h
index 936eab0..ceaef7a 100644
--- a/gpu/src/GrBinHashKey.h
+++ b/gpu/src/GrBinHashKey.h
@@ -36,7 +36,7 @@
         return *this;
     }
 
-    virtual ~GrBinHashKey() {
+    ~GrBinHashKey() {
     }
 
     void setKeyData(const uint32_t *data) {