Fix incorrect opus seek preroll and flaky pre-skip removal.

media/test/pipeline_integration_test_base.h

Index: media/test/pipeline_integration_test_base.h
diff --git a/media/test/pipeline_integration_test_base.h b/media/test/pipeline_integration_test_base.h
index c65ea45401459a07d352cb851c9eec55486c7fc4..8f859f9d304c2046863bf8c530e3e37ec374df77 100644
--- a/media/test/pipeline_integration_test_base.h
+++ b/media/test/pipeline_integration_test_base.h
@@ -71,9 +71,10 @@ class PipelineIntegrationTestBase {
 
   // Starts the pipeline in a particular mode for advanced testing and
   // benchmarking purposes (e.g., underflow is disabled to ensure consistent
-  // hashes).
-  enum kTestType { kHashed, kClockless };
-  PipelineStatus Start(const std::string& filename, kTestType test_type);
+  // hashes).  May be combined using the bitwise or operator (and as such must
+  // have values that are powers of two).
+  enum TestTypeFlags { kHashed = 1, kClockless = 2};
+  PipelineStatus Start(const std::string& filename, uint8_t test_type);
 
   void Play();
   void Pause();