Revert "Change how vertex/instance attributes are handled in geometry processors."

This reverts commit 19c1233c447f625c2522e7ecd0a0adecc629bb2f.

Reason for revert: want to make sure Google3 can roll

Original change's description:
> Change how vertex/instance attributes are handled in geometry processors.
> 
> * No longer register vertex/instance attributes on base class, just counts
> 
> * Separate instance and vertex attributes and remove InputRate and offset
> 
> * Make attributes constexpr where possible
> 
> Change-Id: I1f1d5e772fa177a96d2aeb805aab7b69f35bfae6
> Reviewed-on: https://skia-review.googlesource.com/132405
> Commit-Queue: Brian Salomon <bsalomon@google.com>
> Reviewed-by: Chris Dalton <csmartdalton@google.com>

TBR=egdaniel@google.com,bsalomon@google.com,csmartdalton@google.com

Change-Id: I4800632515e14fbf54af52826928ac915657b59f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/135661
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>

1 files changed, 0 insertions, 37 deletions

diff --git a/src/gpu/GrGeometryProcessor.h b/src/gpu/GrGeometryProcessor.h
index 5035ad0f53..a12ab0058d 100644
--- a/src/gpu/GrGeometryProcessor.h
+++ b/src/gpu/GrGeometryProcessor.h
@@ -39,44 +39,7 @@ protected:
         fSampleShading = sampleShading;
     }
 
-    /**
-     * Recursive helpers for implementing onVertexAttribute or onInstanceAttribute.
-     */
-
-    template <typename... Args>
-    static const Attribute& IthAttribute(int i, const Attribute& attr0, const Args&... attrs) {
-        SkASSERT(attr0.isInitialized());
-        return (0 == i) ? attr0 : IthAttribute(i - 1, attrs...);
-    }
-
-    static const Attribute& IthAttribute(int i) {
-        SK_ABORT("Illegal attribute Index");
-        static constexpr Attribute kBogus;
-        return kBogus;
-    }
-
-    template <typename... Args>
-    static const Attribute& IthInitializedAttribute(int i, const Attribute& attr0,
-                                                    const Args&... attrs) {
-        if (attr0.isInitialized()) {
-            if (0 == i) {
-                return attr0;
-            }
-            i -= 1;
-        }
-        return IthInitializedAttribute(i, attrs...);
-    }
-
-    static const Attribute& IthInitializedAttribute(int i) { return IthAttribute(i); }
-
 private:
-    // Since most subclasses don't use instancing provide a default implementation for that case.
-    const Attribute& onInstanceAttribute(int i) const override {
-        SK_ABORT("No instanced attributes");
-        static constexpr Attribute kBogus;
-        return kBogus;
-    }
-
     bool fWillUseGeoShader;
     float fSampleShading;