diff -r 000000000000 -r 6474c204b198 gfx/skia/trunk/include/gpu/gl/GrGLExtensions.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/skia/trunk/include/gpu/gl/GrGLExtensions.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,71 @@
+/*
+ * Copyright 2013 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrGLExtensions_DEFINED
+#define GrGLExtensions_DEFINED
+
+#include "GrGLFunctions.h"
+#include "SkString.h"
+#include "SkTArray.h"
+
+struct GrGLInterface;
+
+/**
+ * This helper queries the current GL context for its extensions, remembers them, and can be
+ * queried. It supports both glGetString- and glGetStringi-style extension string APIs and will
+ * use the latter if it is available.
+ */
+class SK_API GrGLExtensions {
+public:
+    GrGLExtensions() : fInitialized(false), fStrings(SkNEW(SkTArray<SkString>)) {}
+
+    GrGLExtensions(const GrGLExtensions&);
+
+    GrGLExtensions& operator=(const GrGLExtensions&);
+
+    void swap(GrGLExtensions* that) {
+        fStrings.swap(&that->fStrings);
+        SkTSwap(fInitialized, that->fInitialized);
+    }
+
+    /**
+     * We sometimes need to use this class without having yet created a GrGLInterface. This version
+     * of init expects that getString is always non-NULL while getIntegerv and getStringi are non-
+     * NULL if on desktop GL with version 3.0 or higher. Otherwise it will fail.
+     */
+    bool init(GrGLStandard standard,
+              GrGLGetStringProc getString,
+              GrGLGetStringiProc getStringi,
+              GrGLGetIntegervProc getIntegerv);
+
+    bool isInitialized() const { return fInitialized; }
+
+    /**
+     * Queries whether an extension is present. This will fail if init() has not been called.
+     */
+    bool has(const char[]) const;
+
+    /**
+     * Removes an extension if present. Returns true if the extension was present before the call.
+     */
+    bool remove(const char[]);
+
+    /**
+     * Adds an extension to list
+     */
+    void add(const char[]);
+
+    void reset() { fStrings->reset(); }
+
+    void print(const char* sep = "\n") const;
+
+private:
+    bool                                fInitialized;
+    SkAutoTDelete<SkTArray<SkString> >  fStrings;
+};
+
+#endif