Increase benchmark duration to 10 seconds.

Bug: none
Test: none
Change-Id: I19e2731087799e7f58dfd43c66d65d0ff5e5cfb8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2627873
Auto-Submit: Michael Montvelishsky <mont@chromium.org>
Commit-Queue: Kenneth MacKay <kmackay@chromium.org>
Reviewed-by: Kenneth MacKay <kmackay@chromium.org>
Cr-Commit-Position: refs/heads/master@{#843310}

chromecast/media/cma/backend/mixer/post_processors/post_processor_unittest.cc

@@ -24,7 +24,7 @@ namespace {
 const float kEpsilon = std::numeric_limits<float>::epsilon() * 2;
 
 // Benchmark parameters.
-const float kTestDurationSec = 1.0;
+const float kTestDurationSec = 10.0;
 
 }  // namespace