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/PDFInvalidBitmapTest.cpp b/tests/PDFInvalidBitmapTest.cpp
index 2f4753e..bc7143a 100644
--- a/tests/PDFInvalidBitmapTest.cpp
+++ b/tests/PDFInvalidBitmapTest.cpp
@@ -23,8 +23,8 @@
 public:
     InvalidPixelRef(const SkImageInfo& info) : SkPixelRef(info) {}
 private:
-    virtual bool onNewLockPixels(LockRec*) SK_OVERRIDE { return false; }
-    virtual void onUnlockPixels() SK_OVERRIDE {
+    bool onNewLockPixels(LockRec*) SK_OVERRIDE { return false; }
+    void onUnlockPixels() SK_OVERRIDE {
         SkDEBUGFAIL("InvalidPixelRef can't be locked");
     }
 };