remove one place we read from gpu key in effects

src/effects/gradients/SkLinearGradient.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkLinearGradient.h"
 
 static inline int repeat_bits(int x, const int bits) {
@@ skipping 533 matching lines @@
     SkPaint paint;
     GrColor paintColor;
     GrFragmentProcessor* fp;
     SkAssertResult(shader->asFragmentProcessor(context, paint, NULL, &paintColor, &fp));
     return fp;
 }
 
 /////////////////////////////////////////////////////////////////////
 
 void GrGLLinearGradient::emitCode(GrGLFPBuilder* builder,
-                                  const GrFragmentProcessor&,
+                                  const GrFragmentProcessor& fp,
                                   const GrProcessorKey& key,
                                   const char* outputColor,
                                   const char* inputColor,
                                   const TransformedCoordsArray& coords,
                                   const TextureSamplerArray& samplers) {
-    uint32_t baseKey = key.get32(0);
-    this->emitUniforms(builder, baseKey);
+    const GrGradientEffect& ge = fp.cast<GrGradientEffect>();
+    this->emitUniforms(builder, ge);
     SkString t = builder->getFragmentShaderBuilder()->ensureFSCoords2D(coords, 0);
     t.append(".x");
-    this->emitColor(builder, t.c_str(), baseKey, outputColor, inputColor, samplers);
+    this->emitColor(builder, ge, t.c_str(), outputColor, inputColor, samplers);
 }
 
 /////////////////////////////////////////////////////////////////////
 
 bool SkLinearGradient::asFragmentProcessor(GrContext* context, const SkPaint& paint,
                                            const SkMatrix* localMatrix, GrColor* paintColor,
                                            GrFragmentProcessor** fp)  const {
     SkASSERT(context);
     
     SkMatrix matrix;
@@ skipping 30 matching lines @@
     str->append("SkLinearGradient (");
 
     str->appendf("start: (%f, %f)", fStart.fX, fStart.fY);
     str->appendf(" end: (%f, %f) ", fEnd.fX, fEnd.fY);
 
     this->INHERITED::toString(str);
 
     str->append(")");
 }
 #endif