Make OS audio buffer size limits visible.

media/BUILD.gn

Index: media/BUILD.gn
diff --git a/media/BUILD.gn b/media/BUILD.gn
index aae61e0649f49989a66965baaf0765170291d571..53ea520a8e4356bffef9f46bf8c89c7c07397ec0 100644
--- a/media/BUILD.gn
+++ b/media/BUILD.gn
@@ -760,6 +760,12 @@ component("shared_memory_support") {
     "base/vector_math.h",
     "base/vector_math_testing.h",
   ]
+  if (is_mac) {

[DaleCurtis, 2017/06/27 17:25:07]

We have a base/mac/BUILD.gn this should go in.

[Andrew MacPherson, 2017/06/27 17:46:49]

I had tried this first but it didn't seem to work as AudioLatency depends on
audio_util_mac.cc and audio_latency.cc is built into the "shared_memory_support"
component in this media/BUILD.gn file, so linking failed without including it
here. Does that make sense?

[DaleCurtis, 2017/06/27 17:54:24]

Ah I didn't notice this was in shmem support. This seems fine in that case.
Leave a comment here about why this is the case. Since we've announced the NaCl
deprecation we can hopefully clean this up in a few years.

Lets rename the file to audio_latency_mac.cc for clarity though; util classes
are too vague.

+    sources += [
+      "base/mac/audio_util_mac.cc",
+      "base/mac/audio_util_mac.h",
+    ]
+  }
   configs += [
     ":media_config",
     ":media_implementation",