Add a command line flag for dumping trace events to VLOG

cc/test/cc_test_suite.cc

Index: cc/test/cc_test_suite.cc
diff --git a/cc/test/cc_test_suite.cc b/cc/test/cc_test_suite.cc
index c9d48b7ee763eec975799c24298ffc99e5d56418..6572418dcccc11a0abfae3ded74357bce6a2cf68 100644
--- a/cc/test/cc_test_suite.cc
+++ b/cc/test/cc_test_suite.cc
@@ -4,7 +4,11 @@
 
 #include "cc/test/cc_test_suite.h"
 
+#include "base/command_line.h"
+#include "base/debug/trace_event_impl.h"
 #include "base/message_loop.h"
+#include "base/threading/thread_id_name_manager.h"
+#include "cc/base/switches.h"
 #include "cc/test/paths.h"
 
 namespace cc {
@@ -17,7 +21,19 @@ CCTestSuite::~CCTestSuite() {}
 void CCTestSuite::Initialize() {
   base::TestSuite::Initialize();
   RegisterPathProvider();
+
+  if (CommandLine::ForCurrentProcess()->HasSwitch(
+        switches::kCCUnittestsTraceEventsToStderr)) {
+    base::debug::TraceLog::GetInstance()->SetEnabled(
+        base::debug::CategoryFilter("cc"),
+        base::debug::TraceLog::ECHO_TO_STDERR);

[danakj, 2013/04/24 20:07:41]

Do you want RECORD_CONTINUOUSLY in the options as well? Seems like you want
CONTINUOUSLY or UNTIL_FULL, and the former seems appropriate.

[Ian Vollick, 2013/04/24 22:57:11]

Good call! Done.

+  }
+
   message_loop_.reset(new MessageLoop);
+
+  base::ThreadIdNameManager::GetInstance()->SetName(
+      base::PlatformThread::CurrentId(),
+      "Main");
 }
 
 void CCTestSuite::Shutdown() {