My clang now doesn't complain about !"foo".

bench/GradientBench.cpp

Index: bench/GradientBench.cpp
diff --git a/bench/GradientBench.cpp b/bench/GradientBench.cpp
index b20fc9a65d036f0a4920aabe24f749e84303e845..773522e164bb8340e6b0b8fec0014faf57f44919 100644
--- a/bench/GradientBench.cpp
+++ b/bench/GradientBench.cpp
@@ -137,7 +137,7 @@ static const char* tilemodename(SkShader::TileMode tm) {
         case SkShader::kMirror_TileMode:
             return "mirror";
         default:
-            SkASSERT(!"unknown tilemode");
+            SkDEBUGFAIL("unknown tilemode");
             return "error";
     }
 }
@@ -149,7 +149,7 @@ static const char* geomtypename(GeomType gt) {
         case kOval_GeomType:
             return "oval";
         default:
-            SkASSERT(!"unknown geometry type");
+            SkDEBUGFAIL("unknown geometry type");
             return "error";
     }
 }