Make --undefok a little louder now that we're using it all the time.

tools/flags/SkCommandLineFlags.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkCommandLineFlags.h"
 #include "SkTDArray.h"
 #include "SkTSort.h"
@@ skipping 295 matching lines @@
                     break;
                 }
                 flag = flag->next();
             }
             if (!flagMatched) {
 #if SK_BUILD_FOR_MAC
                 if (SkStrStartsWith(argv[i], "NSDocumentRevisions")) {
                         i++;  // skip YES
                 } else
 #endif
-                if (!FLAGS_undefok) {
-                    SkDebugf("Got unknown flag \"%s\". Exiting.\n", argv[i]);
+                if (FLAGS_undefok) {
+                    SkDebugf("FYI: ignoring unknown flag '%s'.\n", argv[i]);
+                } else {
+                    SkDebugf("Got unknown flag '%s'. Exiting.\n", argv[i]);
                     exit(-1);
                 }
             }
         }
     }
     // Since all of the flags have been set, release the memory used by each
     // flag. FLAGS_x can still be used after this.
     SkFlagInfo* flag = gHead;
     gHead = NULL;
     while (flag != NULL) {
@@ skipping 41 matching lines @@
 }
 
 }  // namespace
 
 bool SkCommandLineFlags::ShouldSkip(const SkTDArray<const char*>& strings, const char* name) {
     return ShouldSkipImpl(strings, name);
 }
 bool SkCommandLineFlags::ShouldSkip(const StringArray& strings, const char* name) {
     return ShouldSkipImpl(strings, name);
 }