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/samplecode/SampleCode.h b/samplecode/SampleCode.h
index 93127eb..d09022f 100644
--- a/samplecode/SampleCode.h
+++ b/samplecode/SampleCode.h
@@ -60,7 +60,7 @@
 class SkFuncViewFactory : public SkViewFactory {
 public:
     SkFuncViewFactory(SkViewCreateFunc func);
-    virtual SkView* operator() () const SK_OVERRIDE;
+    SkView* operator() () const SK_OVERRIDE;
 
 private:
     SkViewCreateFunc fCreateFunc;
@@ -79,7 +79,7 @@
 class SkGMSampleViewFactory : public SkViewFactory {
 public:
     SkGMSampleViewFactory(GMFactoryFunc func);
-    virtual SkView* operator() () const SK_OVERRIDE;
+    SkView* operator() () const SK_OVERRIDE;
 private:
     GMFactoryFunc fFunc;
 };