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/include/gpu/gl/SkGLContext.h b/include/gpu/gl/SkGLContext.h
index 57456c2..6ca7bf5 100644
--- a/include/gpu/gl/SkGLContext.h
+++ b/include/gpu/gl/SkGLContext.h
@@ -19,7 +19,7 @@
 public:
     SK_DECLARE_INST_COUNT(SkGLContext)
 
-    ~SkGLContext() SK_OVERRIDE;
+    ~SkGLContext() override;
 
     bool isValid() const { return NULL != gl(); }
 
diff --git a/include/gpu/gl/SkNullGLContext.h b/include/gpu/gl/SkNullGLContext.h
index 82b96a9..ca71dde 100644
--- a/include/gpu/gl/SkNullGLContext.h
+++ b/include/gpu/gl/SkNullGLContext.h
@@ -12,9 +12,9 @@
 
 class SK_API SkNullGLContext : public SkGLContext {
 public:
-    ~SkNullGLContext() SK_OVERRIDE;
-    void makeCurrent() const SK_OVERRIDE;
-    void swapBuffers() const SK_OVERRIDE {};
+    ~SkNullGLContext() override;
+    void makeCurrent() const override;
+    void swapBuffers() const override {};
 
     static SkNullGLContext* Create(GrGLStandard);
 
diff --git a/include/gpu/gl/angle/SkANGLEGLContext.h b/include/gpu/gl/angle/SkANGLEGLContext.h
index 6705248..f54f29e 100644
--- a/include/gpu/gl/angle/SkANGLEGLContext.h
+++ b/include/gpu/gl/angle/SkANGLEGLContext.h
@@ -14,9 +14,9 @@
 
 class SkANGLEGLContext : public SkGLContext {
 public:
-    ~SkANGLEGLContext() SK_OVERRIDE;
-    void makeCurrent() const SK_OVERRIDE;
-    void swapBuffers() const SK_OVERRIDE;
+    ~SkANGLEGLContext() override;
+    void makeCurrent() const override;
+    void swapBuffers() const override;
 
     static SkANGLEGLContext* Create(GrGLStandard forcedGpuAPI) {
         if (kGL_GrGLStandard == forcedGpuAPI) {