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/RectBench.cpp b/bench/RectBench.cpp
index c0201dc..6228e00 100644
--- a/bench/RectBench.cpp
+++ b/bench/RectBench.cpp
@@ -92,14 +92,14 @@
     }
 
 protected:
-    virtual void setupPaint(SkPaint* paint) SK_OVERRIDE {
+    void setupPaint(SkPaint* paint) SK_OVERRIDE {
         this->INHERITED::setupPaint(paint);
         // srcmode is most interesting when we're not opaque
         paint->setAlpha(0x80);
         paint->setXfermode(fMode);
     }
 
-    virtual const char* onGetName() SK_OVERRIDE {
+    const char* onGetName() SK_OVERRIDE {
         fName.set(this->INHERITED::onGetName());
         fName.prepend("srcmode_");
         return fName.c_str();