Add SkDEBUGFAIL to clean up use of SkASSERT(!"text");
catch a couple of latent SkASSERT("text") bugs.

http://codereview.appspot.com/5504090/



git-svn-id: http://skia.googlecode.com/svn/trunk@2926 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/pipe/SkGPipeWrite.cpp b/src/pipe/SkGPipeWrite.cpp
index 9398d70..00d5d5f 100644
--- a/src/pipe/SkGPipeWrite.cpp
+++ b/src/pipe/SkGPipeWrite.cpp
@@ -35,7 +35,7 @@
         case kShader_PaintFlat:         return paint.getShader();
         case kXfermode_PaintFlat:       return paint.getXfermode();
     }
-    SkASSERT(!"never gets here");
+    SkDEBUGFAIL("never gets here");
     return NULL;
 }