Fix a few clang errors while trying to build tools target.

src/core/SkBitmapSampler.cpp

Index: src/core/SkBitmapSampler.cpp
diff --git a/src/core/SkBitmapSampler.cpp b/src/core/SkBitmapSampler.cpp
index da8aa8a5ba886a1300828cebf5e2a87900ab7333..2b68510445c72ee8d540d7f58598c313f282f392 100644
--- a/src/core/SkBitmapSampler.cpp
+++ b/src/core/SkBitmapSampler.cpp
@@ -290,7 +290,6 @@ class A8_NoFilter_Sampler : public SkBitmapSampler {
 public:
     A8_NoFilter_Sampler(const SkBitmap& bm, SkShader::TileMode tmx, SkShader::TileMode tmy)
         : SkBitmapSampler(bm, false, tmx, tmy)
-        , fProcTable(NULL)
     {
     }
 
@@ -309,7 +308,6 @@ public:
     }
 
 private:
-    const SkFilterProc* fProcTable;
     SkPMColor           fColor;
 };