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/doc/SkDocument_PDF.cpp b/src/doc/SkDocument_PDF.cpp
index 834cbc3..de65efe 100644
--- a/src/doc/SkDocument_PDF.cpp
+++ b/src/doc/SkDocument_PDF.cpp
@@ -49,7 +49,7 @@
         return fCanvas;
     }
 
-    virtual void onEndPage() SK_OVERRIDE {
+    void onEndPage() SK_OVERRIDE {
         SkASSERT(fCanvas);
         SkASSERT(fDevice);
 
@@ -63,7 +63,7 @@
         fDevice = NULL;
     }
 
-    virtual bool onClose(SkWStream* stream) SK_OVERRIDE {
+    bool onClose(SkWStream* stream) SK_OVERRIDE {
         SkASSERT(NULL == fCanvas);
         SkASSERT(NULL == fDevice);
 
@@ -73,7 +73,7 @@
         return success;
     }
 
-    virtual void onAbort() SK_OVERRIDE {
+    void onAbort() SK_OVERRIDE {
         SkDELETE(fDoc);
         fDoc = NULL;
     }