Add WebThread in AudioDestination to support AudioWorkletThread

third_party/WebKit/Source/platform/BUILD.gn

Index: third_party/WebKit/Source/platform/BUILD.gn
diff --git a/third_party/WebKit/Source/platform/BUILD.gn b/third_party/WebKit/Source/platform/BUILD.gn
index 425c5052346e73eddad73a0f619494c63dbdb5ef..ec72ee2808cd69ee1171d5bf1ac879552a28d8ba 100644
--- a/third_party/WebKit/Source/platform/BUILD.gn
+++ b/third_party/WebKit/Source/platform/BUILD.gn
@@ -2161,6 +2161,9 @@ source_set("unit_tests") {
 
     # TODO(toyoshim): Remove Platform dependency and move to loader/BUILD.gn
     "loader/fetch/ResourceResponseTest.cpp",
+
+    # TODO(hongchan): Remove Platform dependency and move to audio/BUILD.gn
+    "audio/PushPullFIFOSmokeTest.cpp",

[hongchan, 2017/04/20 18:01:37]

To be able to spawn a thread from Platform::Current(), this change is necessary.

[haraken, 2017/04/20 20:20:51]

Would you help me understand the problem? platform/audio/ should be able to use
Platform::Current(). What's an issue of moving it to audio/BUILD.gn?

[hongchan, 2017/04/20 20:35:09]

With the blink_platform_unittests, Platform::Current()->CreateThread() returns
nullptr. Thus all the thread operations makes the test crash.

   ]
 
   configs += [