Fix up all the easy virtual ... SK_OVERRIDE cases.

src/utils/SkSHA1.h

Index: src/utils/SkSHA1.h
diff --git a/src/utils/SkSHA1.h b/src/utils/SkSHA1.h
index df8b9bf1b68ca58c19c27748b0faa0b14f62ed73..e7ede6464055f3151c6b4c1c6c76eda977cfefae 100644
--- a/src/utils/SkSHA1.h
+++ b/src/utils/SkSHA1.h
@@ -24,12 +24,12 @@ public:
     /** Processes input, adding it to the digest.
      *  Note that this treats the buffer as a series of uint8_t values.
      */
-    virtual bool write(const void* buffer, size_t size) SK_OVERRIDE {
+    bool write(const void* buffer, size_t size) SK_OVERRIDE {
         update(reinterpret_cast<const uint8_t*>(buffer), size);
         return true;
     }
 
-    virtual size_t bytesWritten() const SK_OVERRIDE { return SkToSizeT(this->byteCount); }
+    size_t bytesWritten() const SK_OVERRIDE { return SkToSizeT(this->byteCount); }
 
     /** Processes input, adding it to the digest. Calling this after finish is undefined. */
     void update(const uint8_t* input, size_t length);