remove unneeded SkShader::validContext

src/effects/gradients/SkTwoPointConicalGradient.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 "SkTwoPointConicalGradient.h"
 
 #include "SkTwoPointConicalGradient_gpu.h"
@@ skipping 203 matching lines @@
     // Because areas outside the cone are left untouched, we cannot treat the
     // shader as opaque even if the gradient itself is opaque.
     // TODO(junov): Compute whether the cone fills the plane crbug.com/222380
     return false;
 }
 
 size_t SkTwoPointConicalGradient::contextSize() const {
     return sizeof(TwoPointConicalGradientContext);
 }
 
-SkShader::Context* SkTwoPointConicalGradient::createContext(const ContextRec& rec,
-                                                            void* storage) const {
-    if (!this->validContext(rec)) {
-        return NULL;
-    }
-
+SkShader::Context* SkTwoPointConicalGradient::onCreateContext(const ContextRec& rec,
+                                                              void* storage) const {
     return SkNEW_PLACEMENT_ARGS(storage, TwoPointConicalGradientContext, (*this, rec));
 }
 
 SkTwoPointConicalGradient::TwoPointConicalGradientContext::TwoPointConicalGradientContext(
         const SkTwoPointConicalGradient& shader, const ContextRec& rec)
     : INHERITED(shader, rec)
 {
     // we don't have a span16 proc
     fFlags &= ~kHasSpan16_Flag;
 
@@ skipping 178 matching lines @@
     str->appendScalar(fCenter2.fY);
     str->append(") radius2: ");
     str->appendScalar(fRadius2);
     str->append(" ");
 
     this->INHERITED::toString(str);
 
     str->append(")");
 }
 #endif