C++11 override should now be supported by all of {bots,Chrome,Android,Mozilla}

NOPRESUBMIT=true

BUG=skia:
DOCS_PREVIEW= https://skia.org/?cl=1037793002

Review URL: https://codereview.chromium.org/1037793002
diff --git a/samplecode/SampleAll.cpp b/samplecode/SampleAll.cpp
index 39f7722..9a39ef9 100644
--- a/samplecode/SampleAll.cpp
+++ b/samplecode/SampleAll.cpp
@@ -53,7 +53,7 @@
 class SkGrayScaleColorFilter : public SkColorFilter {
 public:
     virtual void filterSpan(const SkPMColor src[], int count,
-                            SkPMColor result[]) const SK_OVERRIDE {
+                            SkPMColor result[]) const override {
         for (int i = 0; i < count; i++)
             result[i] = rgb2gray(src[i]);
     }
@@ -66,7 +66,7 @@
     }
 
     virtual void filterSpan(const SkPMColor src[], int count,
-                            SkPMColor result[]) const SK_OVERRIDE {
+                            SkPMColor result[]) const override {
         SkPMColor mask = fMask;
         for (int i = 0; i < count; i++) {
             result[i] = src[i] & mask;
@@ -167,11 +167,11 @@
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(Dot2DPathEffect)
 
 protected:
-    void next(const SkPoint& loc, int u, int v, SkPath* dst) const SK_OVERRIDE {
+    void next(const SkPoint& loc, int u, int v, SkPath* dst) const override {
         dst->addCircle(loc.fX, loc.fY, fRadius);
     }
 
-    void flatten(SkWriteBuffer& buffer) const SK_OVERRIDE {
+    void flatten(SkWriteBuffer& buffer) const override {
         this->INHERITED::flatten(buffer);
         buffer.writeScalar(fRadius);
     }