gm: add --ignoreTests flag

gm/gmmain.cpp

Index: gm/gmmain.cpp
===================================================================
--- gm/gmmain.cpp	(revision 11353)
+++ gm/gmmain.cpp	(working copy)
@@ -905,6 +905,9 @@
                  * See comments above complete_bitmap() for more detail.
                  */
                 Expectations expectations = expectationsSource->get(nameWithExtension.c_str());
+                if (gm->isIgnoringFailures()) {
+                    expectations.setIgnoreFailure(true);
+                }
                 errors.add(compare_to_expectations(expectations, *actualBitmapAndDigest,
                                                    gm->shortName(), configName, "", true));
             } else {
@@ -1380,6 +1383,8 @@
 DEFINE_string(ignoreErrorTypes, kDefaultIgnorableErrorTypes.asString(" ").c_str(),
               "Space-separated list of ErrorTypes that should be ignored. If any *other* error "
               "types are encountered, the tool will exit with a nonzero return value.");
+DEFINE_string(ignoreTests, "", "Space delimited list of tests for which we should ignore "
+              "failures.");
 DEFINE_string(match, "", "[~][^]substring[$] [...] of test name to run.\n"
               "Multiple matches may be separated by spaces.\n"
               "~ causes a matching test to always be skipped\n"
@@ -2163,6 +2168,9 @@
         if (SkCommandLineFlags::ShouldSkip(FLAGS_match, shortName)) {
             continue;
         }
+        if (FLAGS_ignoreTests.contains(shortName)) {

[epoger, 2013/09/18 20:10:35]

Patchset 3: if the --ignoreTests flag has been passed, use it.

[scroggo, 2013/09/18 20:16:54]

Might it make sense to allow pattern matching? (If so, that's probably a
separate CL, but just wanted to throw it out there.)

[epoger, 2013/09/19 06:16:36]

That's a worthy suggestion, thanks.  As per
https://code.google.com/p/skia/issues/detail?id=1600#c7 , I think I'll keep it
simple (as-is) for now, but we may want to re-evaluate later on...

+            gm->setIgnoreFailures(true);
+        }
 
         gmsRun++;
         SkISize size = gm->getISize();