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

BUG=
R=robertphillips@google.com

Review URL: https://codereview.chromium.org/22875037

git-svn-id: http://skia.googlecode.com/svn/trunk@10874 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/effects/SkDisplacementMapEffect.cpp b/src/effects/SkDisplacementMapEffect.cpp
index dad0623..6a3abb5 100644
--- a/src/effects/SkDisplacementMapEffect.cpp
+++ b/src/effects/SkDisplacementMapEffect.cpp
@@ -21,7 +21,7 @@
 
 template<SkDisplacementMapEffect::ChannelSelectorType type>
 uint32_t getValue(SkColor, const SkUnPreMultiply::Scale*) {
-    SkASSERT(!"Unknown channel selector");
+    SkDEBUGFAIL("Unknown channel selector");
     return 0;
 }
 
@@ -97,7 +97,7 @@
         break;
       case SkDisplacementMapEffect::kUnknown_ChannelSelectorType:
       default:
-        SkASSERT(!"Unknown Y channel selector");
+        SkDEBUGFAIL("Unknown Y channel selector");
     }
 }
 
@@ -124,7 +124,7 @@
         break;
       case SkDisplacementMapEffect::kUnknown_ChannelSelectorType:
       default:
-        SkASSERT(!"Unknown X channel selector");
+        SkDEBUGFAIL("Unknown X channel selector");
     }
 }
 
@@ -456,7 +456,7 @@
         break;
       case SkDisplacementMapEffect::kUnknown_ChannelSelectorType:
       default:
-        SkASSERT(!"Unknown X channel selector");
+        SkDEBUGFAIL("Unknown X channel selector");
     }
 
     switch (fYChannelSelector) {
@@ -474,7 +474,7 @@
         break;
       case SkDisplacementMapEffect::kUnknown_ChannelSelectorType:
       default:
-        SkASSERT(!"Unknown Y channel selector");
+        SkDEBUGFAIL("Unknown Y channel selector");
     }
     builder->fsCodeAppend("-vec2(0.5));\t\t");