Update more directories under src/ to follow C++11 style rule for {virtual,override}.

src/pdf/SkPDFTypes.h

Index: src/pdf/SkPDFTypes.h
diff --git a/src/pdf/SkPDFTypes.h b/src/pdf/SkPDFTypes.h
index bc24dd5cf5c7c06069b98bc585f70cacfb39f9d3..69da87b36052bae0ebfa4aaaaed501e2b5360145 100644
--- a/src/pdf/SkPDFTypes.h
+++ b/src/pdf/SkPDFTypes.h
@@ -257,11 +257,11 @@ public:
     virtual ~SkPDFArray();
 
     // The SkPDFObject interface.
-    virtual void emitObject(SkWStream* stream,
-                            const SkPDFObjNumMap& objNumMap,
-                            const SkPDFSubstituteMap& substitutes) override;
-    virtual void addResources(SkPDFObjNumMap*,
-                              const SkPDFSubstituteMap&) const override;
+    void emitObject(SkWStream* stream,
+                    const SkPDFObjNumMap& objNumMap,
+                    const SkPDFSubstituteMap& substitutes) override;
+    void addResources(SkPDFObjNumMap*,
+                      const SkPDFSubstituteMap&) const override;
 
     /** The size of the array.
      */
@@ -319,11 +319,11 @@ public:
     virtual ~SkPDFDict();
 
     // The SkPDFObject interface.
-    virtual void emitObject(SkWStream* stream,
-                            const SkPDFObjNumMap& objNumMap,
-                            const SkPDFSubstituteMap& substitutes) override;
-    virtual void addResources(SkPDFObjNumMap*,
-                              const SkPDFSubstituteMap&) const override;
+    void emitObject(SkWStream* stream,
+                    const SkPDFObjNumMap& objNumMap,
+                    const SkPDFSubstituteMap& substitutes) override;
+    void addResources(SkPDFObjNumMap*,
+                      const SkPDFSubstituteMap&) const override;
 
     /** The size of the dictionary.
      */