add SkShader::newWithColorFilter

src/core/SkColorFilterShader.h

Index: src/core/SkColorFilterShader.h
diff --git a/src/core/SkFilterShader.h b/src/core/SkColorFilterShader.h
similarity index 51%
rename from src/core/SkFilterShader.h
rename to src/core/SkColorFilterShader.h
index ea5eaed34fe59428574bdd746df474f444e12e6c..e92908ee83dd421649f9ca28ae547216e31496c9 100644
--- a/src/core/SkFilterShader.h
+++ b/src/core/SkColorFilterShader.h
@@ -1,57 +1,62 @@
 /*
- * Copyright 2012 Google Inc.
+ * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
-#ifndef SkFilterShader_DEFINED
-#define SkFilterShader_DEFINED
+#ifndef SkColorFilterShader_DEFINED
+#define SkColorFilterShader_DEFINED
 
+#include "SkColorFilter.h"
 #include "SkShader.h"
 
-class SkColorFilter;
-
-class SkFilterShader : public SkShader {
+class SkColorFilterShader : public SkShader {
 public:
-    SkFilterShader(SkShader* shader, SkColorFilter* filter);
-    virtual ~SkFilterShader();
-
+    SkColorFilterShader(SkShader* shader, SkColorFilter* filter);
+    
     size_t contextSize() const override;
+    
+#if SK_SUPPORT_GPU
+    const GrFragmentProcessor* asFragmentProcessor(GrContext*,
+                                                   const SkMatrix& viewM,
+                                                   const SkMatrix* localMatrix,
+                                                   SkFilterQuality) const override;
+#endif
 
     class FilterShaderContext : public SkShader::Context {
     public:
         // Takes ownership of shaderContext and calls its destructor.
-        FilterShaderContext(const SkFilterShader&, SkShader::Context*, const ContextRec&);
+        FilterShaderContext(const SkColorFilterShader&, SkShader::Context*, const ContextRec&);
         virtual ~FilterShaderContext();
-
+        
         uint32_t getFlags() const override;
-
+        
         void shadeSpan(int x, int y, SkPMColor[], int count) override;
-
+        
         void set3DMask(const SkMask* mask) override {
             // forward to our proxy
             fShaderContext->set3DMask(mask);
         }
-
+        
     private:
         SkShader::Context* fShaderContext;
-
+        
         typedef SkShader::Context INHERITED;
     };
-
+    
     SK_TO_STRING_OVERRIDE()
-    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkFilterShader)
-
+    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkColorFilterShader)
+    
 protected:
     void flatten(SkWriteBuffer&) const override;
     Context* onCreateContext(const ContextRec&, void* storage) const override;
-
-
+    
+    
 private:
-    SkShader*       fShader;
-    SkColorFilter*  fFilter;
-
+    SkAutoTUnref<SkShader>      fShader;
+    SkAutoTUnref<SkColorFilter> fFilter;
+    
     typedef SkShader INHERITED;
 };