Initial error handling code

include/core/SkComposeShader.h

Index: include/core/SkComposeShader.h
diff --git a/include/core/SkComposeShader.h b/include/core/SkComposeShader.h
index 524161b785b1f5b2e03bfc1b861be82cca7c2d6e..4f6570ba9ca3b936f7de3f9d7d1dc851870013ee 100644
--- a/include/core/SkComposeShader.h
+++ b/include/core/SkComposeShader.h
@@ -21,6 +21,8 @@ class SkXfermode;
     a xfermode.
 */
 class SK_API SkComposeShader : public SkShader {
+    typedef SkShader INHERITED;
+
 public:
     /** Create a new compose shader, given shaders A, B, and a combining xfermode mode.
         When the xfermode is called, it will be given the result from shader A as its
@@ -51,8 +53,6 @@ private:
     SkShader*   fShaderA;
     SkShader*   fShaderB;
     SkXfermode* fMode;
-
-    typedef SkShader INHERITED;
 };
 
 #endif