style nit cleanups. e.g. remove 'virtual' on override declarations

src/core/SkXfermode_proccoeff.h

Index: src/core/SkXfermode_proccoeff.h
diff --git a/src/core/SkXfermode_proccoeff.h b/src/core/SkXfermode_proccoeff.h
index 6a3a24409b36223b0e2055553b2b8f7c2bee2ce7..596b2acc468cbad5a11a740996a40cdc907e40a8 100644
--- a/src/core/SkXfermode_proccoeff.h
+++ b/src/core/SkXfermode_proccoeff.h
@@ -1,3 +1,10 @@
+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
 #ifndef SkXfermode_proccoeff_DEFINED
 #define SkXfermode_proccoeff_DEFINED
 
@@ -23,12 +30,12 @@ public:
         fDstCoeff = rec.fDC;
     }
 
-    virtual void xfer32(SkPMColor dst[], const SkPMColor src[], int count,
-                        const SkAlpha aa[]) const override;
-    virtual void xfer16(uint16_t dst[], const SkPMColor src[], int count,
-                        const SkAlpha aa[]) const override;
-    virtual void xferA8(SkAlpha dst[], const SkPMColor src[], int count,
-                        const SkAlpha aa[]) const override;
+    void xfer32(SkPMColor dst[], const SkPMColor src[], int count,
+                const SkAlpha aa[]) const override;
+    void xfer16(uint16_t dst[], const SkPMColor src[], int count,
+                const SkAlpha aa[]) const override;
+    void xferA8(SkAlpha dst[], const SkPMColor src[], int count,
+                const SkAlpha aa[]) const override;
 
     bool asMode(Mode* mode) const override;
 
@@ -37,10 +44,9 @@ public:
     bool isOpaque(SkXfermode::SrcColorOpacity opacityType) const override;
 
 #if SK_SUPPORT_GPU
-    virtual bool asFragmentProcessor(GrFragmentProcessor**,
-                                     GrTexture* background) const override;
+    bool asFragmentProcessor(GrFragmentProcessor**, GrTexture* background) const override;
 
-    virtual bool asXPFactory(GrXPFactory**) const override;
+    bool asXPFactory(GrXPFactory**) const override;
 #endif
 
     SK_TO_STRING_OVERRIDE()