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

tools/render_pdfs_main.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkCanvas.h"
 #include "SkCommandLineFlags.h"
 #include "SkDocument.h"
@@ skipping 104 matching lines @@
     return replace_filename_extension(path,
                                       SKP_FILE_EXTENSION,
                                       PDF_FILE_EXTENSION);
 }
 
 namespace {
 // This is a write-only stream.
 class NullWStream : public SkWStream {
 public:
     NullWStream() : fBytesWritten(0) { }
-    virtual bool write(const void*, size_t size) SK_OVERRIDE {
+    bool write(const void*, size_t size) SK_OVERRIDE {
         fBytesWritten += size;
         return true;
     }
-    virtual size_t bytesWritten() const SK_OVERRIDE { return fBytesWritten; }
+    size_t bytesWritten() const SK_OVERRIDE { return fBytesWritten; }
     size_t fBytesWritten;
 };
 }  // namespace
 
 /** Write the output of pdf renderer to a file.
  * @param outputDir Output dir.
  * @param inputFilename The skp file that was read.
  * @param renderer The object responsible to write the pdf file.
  */
 static SkWStream* open_stream(const SkString& outputDir,
@@ skipping 158 matching lines @@
         return -1;
     }
 #endif
     return 0;
 }
 #if !defined SK_BUILD_FOR_IOS
 int main(int argc, char * const argv[]) {
     return tool_main(argc, (char**) argv);
 }
 #endif