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

This fixes every case where virtual and SK_OVERRIDE were on the same line,
which should be the bulk of cases.  We'll have to manually clean up the rest
over time unless I level up in regexes.

for f in (find . -type f); perl -p -i -e 's/virtual (.*)SK_OVERRIDE/\1SK_OVERRIDE/g' $f; end

BUG=skia:

Review URL: https://codereview.chromium.org/806653007
diff --git a/bench/BitmapScaleBench.cpp b/bench/BitmapScaleBench.cpp
index 665e294..e5cd587 100644
--- a/bench/BitmapScaleBench.cpp
+++ b/bench/BitmapScaleBench.cpp
@@ -88,7 +88,7 @@
         setName( "filter" );
     }
 protected:
-    virtual void doScaleImage() SK_OVERRIDE {
+    void doScaleImage() SK_OVERRIDE {
         SkCanvas canvas( fOutputBitmap );
         SkPaint paint;