Minor logging change for catching development errors during testing.

net/spdy/spdy_protocol.cc

Index: net/spdy/spdy_protocol.cc
diff --git a/net/spdy/spdy_protocol.cc b/net/spdy/spdy_protocol.cc
index a5f3a1c679198be225f1bb416f2b66937001f18f..157993caff8afc21e91ef5abfab360ac7cce6241 100644
--- a/net/spdy/spdy_protocol.cc
+++ b/net/spdy/spdy_protocol.cc
@@ -85,8 +85,6 @@ SpdyFrameType SpdyConstants::ParseFrameType(SpdyMajorVersion version,
           return HEADERS;
         case 9:
           return WINDOW_UPDATE;
-        default:
-          return DATA;
       }
     case SPDY4:
       switch (frame_type_field) {
@@ -111,10 +109,10 @@ SpdyFrameType SpdyConstants::ParseFrameType(SpdyMajorVersion version,
           return CONTINUATION;
         case 10:
           return BLOCKED;
-        default:
-          return DATA;
       }
   }
+
+  LOG(DFATAL) << "Unhandled frame type " << frame_type_field;
   return DATA;
 }
 
@@ -141,6 +139,7 @@ int SpdyConstants::SerializeFrameType(SpdyMajorVersion version,
         case WINDOW_UPDATE:
           return 9;
         default:
+          LOG(DFATAL) << "Serializing unhandled frame type " << frame_type;
           return -1;
       }
     case SPDY4:
@@ -167,6 +166,7 @@ int SpdyConstants::SerializeFrameType(SpdyMajorVersion version,
         case BLOCKED:
           return 10;
         default:
+          LOG(DFATAL) << "Serializing unhandled frame type " << frame_type;
           return -1;
       }
   }