Move the ability to access textures, buffers, and image storages out from GrProcessor.

GrXferProcessor can no longer use this functionality so it is moved to a new intermediate class inherited by GrFragmentProcessor and GrPrimitiveProcessor.

Change-Id: I4f30c89bdceb2d77b602bf0646107e0780881c26
Reviewed-on: https://skia-review.googlesource.com/11202
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
diff --git a/src/gpu/effects/GrSimpleTextureEffect.cpp b/src/gpu/effects/GrSimpleTextureEffect.cpp
index 5d2c288..a41ed8b 100644
--- a/src/gpu/effects/GrSimpleTextureEffect.cpp
+++ b/src/gpu/effects/GrSimpleTextureEffect.cpp
@@ -63,7 +63,8 @@
     }
 
 protected:
-    void onSetData(const GrGLSLProgramDataManager& pdman, const GrProcessor& processor) override {
+    void onSetData(const GrGLSLProgramDataManager& pdman,
+                   const GrFragmentProcessor& processor) override {
         const GrSimpleTextureEffect& textureEffect = processor.cast<GrSimpleTextureEffect>();
         if (SkToBool(textureEffect.colorSpaceXform())) {
             fColorSpaceHelper.setData(pdman, textureEffect.colorSpaceXform());