Don't change textures wrap modes on every draw.

Change-Id: If6d3f313778cc7f3e803a063338539c8b3e165e3
diff --git a/libs/hwui/SkiaShader.h b/libs/hwui/SkiaShader.h
index 011991a..4cd1b8b 100644
--- a/libs/hwui/SkiaShader.h
+++ b/libs/hwui/SkiaShader.h
@@ -97,7 +97,7 @@
     void computeScreenSpaceMatrix(mat4& screenSpace, const mat4& modelView);
 
 protected:
-    inline void bindTexture(GLuint texture, GLenum wrapS, GLenum wrapT, GLuint textureUnit);
+    inline void bindTexture(Texture* texture, GLenum wrapS, GLenum wrapT, GLuint textureUnit);
 
     Type mType;
     SkShader* mKey;
@@ -138,7 +138,7 @@
     }
 
     SkBitmap* mBitmap;
-    const Texture* mTexture;
+    Texture* mTexture;
     GLenum mWrapS;
     GLenum mWrapT;
 }; // struct SkiaBitmapShader