Deleted SkImage::newShaderClamp: not used, not implemented.

include/core/SkImage.h

Index: include/core/SkImage.h
diff --git a/include/core/SkImage.h b/include/core/SkImage.h
index c9f93961668482cd4dee3122dd99013c857f04b9..ca7dc1b66d75801a39cf5f1c6b1037a61bee4cbc 100644
--- a/include/core/SkImage.h
+++ b/include/core/SkImage.h
@@ -16,7 +16,6 @@
 class SkData;
 class SkCanvas;
 class SkPaint;
-class SkShader;
 class GrContext;
 class GrTexture;
 
@@ -61,8 +60,7 @@ public:
      */
     GrTexture* getTexture();
 
-    SkShader*   newShaderClamp() const;
-    SkShader*   newShader(SkShader::TileMode, SkShader::TileMode) const;
+    virtual SkShader* newShader(SkShader::TileMode, SkShader::TileMode) const = 0;
 
     void draw(SkCanvas*, SkScalar x, SkScalar y, const SkPaint*);