Let DM run unit tests.

dm/DMTestTask.cpp

+#include "DMTestTask.h"
+#include "DMUtil.h"
+#include "SkCommandLineFlags.h"
+
+DEFINE_bool2(pathOpsExtended,     x, false, "Run extended pathOps tests.");
+DEFINE_bool2(pathOpsSingleThread, z, false, "Disallow pathOps tests from using threads.");
+DEFINE_bool2(pathOpsVerbose,      V, false, "Tell pathOps tests to be verbose.");
+
+namespace DM {
+
+TestTask::TestTask(Reporter* reporter,
+                   TaskRunner* tasks,
+                   skiatest::TestRegistry::Factory factory)
+    : Task(reporter, tasks)
+    , fTest(factory(NULL))
+    , fName(UnderJoin("test", fTest->getName())) {}
+
+void TestTask::draw() {
+    fTest->setReporter(&fTestReporter);
+    fTest->run();
+    if (!fTest->passed()) {
+        this->fail(fTestReporter.failure());
+    }
+}
+
+bool TestTask::TestReporter::allowExtendedTest() const { return FLAGS_pathOpsExtended; }
+bool TestTask::TestReporter::allowThreaded()     const { return !FLAGS_pathOpsSingleThread; }
+bool TestTask::TestReporter::verbose()           const { return FLAGS_pathOpsVerbose; }
+
+}  // namespace DM