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/src/utils/SkEventTracer.cpp b/src/utils/SkEventTracer.cpp
index 694becf..4c0470b 100644
--- a/src/utils/SkEventTracer.cpp
+++ b/src/utils/SkEventTracer.cpp
@@ -25,7 +25,7 @@
                                  const char* name,
                                  SkEventTracer::Handle handle) SK_OVERRIDE {};
 
-    virtual const uint8_t* getCategoryGroupEnabled(const char* name) SK_OVERRIDE {
+    const uint8_t* getCategoryGroupEnabled(const char* name) SK_OVERRIDE {
         static uint8_t no = 0;
         return &no;
     };