Change SkShader;asFragmentProcessor signature to no longer take skpaint\grcolor*

include/gpu/effects/GrExtractAlphaFragmentProcessor.h

Index: include/gpu/effects/GrExtractAlphaFragmentProcessor.h
diff --git a/include/gpu/effects/GrExtractAlphaFragmentProcessor.h b/include/gpu/effects/GrExtractAlphaFragmentProcessor.h
new file mode 100644
index 0000000000000000000000000000000000000000..d26f00f9a9cdb89ef60a499a256cd963494991c8
--- /dev/null
+++ b/include/gpu/effects/GrExtractAlphaFragmentProcessor.h
@@ -0,0 +1,45 @@
+/*
+ * 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 GrExtractAlphaFragmentProcessor_DEFINED
+#define GrExtractAlphaFragmentProcessor_DEFINED
+
+#include "GrFragmentProcessor.h"
+
+/** This processor extracts the incoming color's alpha, ignores r, g, and b, and feeds
+    the replicated alpha to it's inner processor. */
+class GrExtractAlphaFragmentProcessor : public GrFragmentProcessor {
+public:
+    static GrFragmentProcessor* Create(const GrFragmentProcessor* processor) {
+        if (!processor) {
+            return nullptr;
+        }
+        return SkNEW_ARGS(GrExtractAlphaFragmentProcessor, (processor));
+    }
+
+    ~GrExtractAlphaFragmentProcessor() override {}
+
+    const char* name() const override { return "Extract Alpha"; }
+
+private:
+    GrExtractAlphaFragmentProcessor(const GrFragmentProcessor* processor) {
+        this->initClassID<GrExtractAlphaFragmentProcessor>();
+        this->registerChildProcessor(processor);
+    }
+
+    GrGLFragmentProcessor* onCreateGLInstance() const override;
+
+    void onGetGLProcessorKey(const GrGLSLCaps&, GrProcessorKeyBuilder*) const override;
+
+    bool onIsEqual(const GrFragmentProcessor&) const override;
+
+    void onComputeInvariantOutput(GrInvariantOutput* inout) const override;
+
+    typedef GrFragmentProcessor INHERITED;
+};
+
+#endif