Remove run limit and fix OnDurationChange log spam.

kUnreliableDuration now means we can't rely on OnDurationChange
events, which is fine since we generally use this with bad media.

This also removes the run limit since the fuzzer seems to run fine
locally now > 500000.

BUG=758631
TEST=local long run

Change-Id: I4b585776c64c1860c72ae89fc8ab5c020f266bdb
Reviewed-on: https://chromium-review.googlesource.com/688002Reviewed-by: Max Moroz <mmoroz@chromium.org>
Commit-Queue: Dale Curtis <dalecurtis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#505282}

media/test/BUILD.gn

@@ -211,9 +211,6 @@ foreach(variant, pipeline_integration_fuzzer_variants) {
     ]
 
     libfuzzer_options = [
-      # This is done to avoid DEATH of ASan with "Thread limit exceeded" error.
-      "runs=500000",
-
       # This is done to suppress tons of log messages generated by gmock asserts.
       "close_fd_mask=1",
     ]

media/test/pipeline_integration_test_base.cc

@@ -233,7 +233,7 @@ PipelineStatus PipelineIntegrationTestBase::StartInternal(
   // that it's called at least once. Such streams may repeatedly update their
   // duration as new packets are demuxed.
   if (test_type & kUnreliableDuration) {
-    EXPECT_CALL(*this, OnDurationChange()).Times(AtLeast(1));
+    EXPECT_CALL(*this, OnDurationChange()).Times(AnyNumber());
   } else {
     EXPECT_CALL(*this, OnDurationChange())
         .Times(AtMost(2))