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/tests/OnceTest.cpp b/tests/OnceTest.cpp
index da901f4..6ab9cd2 100644
--- a/tests/OnceTest.cpp
+++ b/tests/OnceTest.cpp
@@ -39,7 +39,7 @@
     SkOnceFlag* once;
     int* ptr;
 
-    virtual void run() SK_OVERRIDE {
+    void run() SK_OVERRIDE {
         SkOnce(once, add_six, ptr);
     }
 };