Enable clean child process exit in sanitizer builds on ChromeOS.

This was blocked on a WebRTC issue for a long time. However,
latest trybot runs appear green.

BUG=360622, 324216, 307043
TBR=jam@chromium.org

Review URL: https://codereview.chromium.org/227533008

Cr-Commit-Position: refs/heads/master@{#315350}

content/browser/child_process_launcher.cc

@@ -163,10 +163,9 @@ ChildProcessLauncher::Context::Context()
       zygote_(false),
 #endif
       starting_(true),
-      // TODO(earthdok): Re-enable on CrOS http://crbug.com/360622
-#if (defined(ADDRESS_SANITIZER) || defined(LEAK_SANITIZER) || \
-     defined(MEMORY_SANITIZER) || defined(THREAD_SANITIZER) || \
-     defined(UNDEFINED_SANITIZER)) && !defined(OS_CHROMEOS)
+#if defined(ADDRESS_SANITIZER) || defined(LEAK_SANITIZER) || \
+    defined(MEMORY_SANITIZER) || defined(THREAD_SANITIZER) || \
+    defined(UNDEFINED_SANITIZER)
       terminate_child_on_shutdown_(false) {
 #else
       terminate_child_on_shutdown_(true) {

content/child/child_thread_impl.cc

@@ -79,10 +79,9 @@ base::LazyInstance<base::ThreadLocalPointer<ChildThreadImpl> > g_lazy_tls =
 // plugins), PluginThread has EnsureTerminateMessageFilter.
 #if defined(OS_POSIX)
 
-// TODO(earthdok): Re-enable on CrOS http://crbug.com/360622
-#if (defined(ADDRESS_SANITIZER) || defined(LEAK_SANITIZER) || \
-     defined(MEMORY_SANITIZER) || defined(THREAD_SANITIZER) || \
-     defined(UNDEFINED_SANITIZER)) && !defined(OS_CHROMEOS)
+#if defined(ADDRESS_SANITIZER) || defined(LEAK_SANITIZER) || \
+    defined(MEMORY_SANITIZER) || defined(THREAD_SANITIZER) || \
+    defined(UNDEFINED_SANITIZER)
 // A thread delegate that waits for |duration| and then exits the process with
 // _exit(0).
 class WaitAndExitDelegate : public base::PlatformThread::Delegate {
@@ -137,10 +136,9 @@ class SuicideOnChannelErrorFilter : public IPC::MessageFilter {
     //
     // So, we install a filter on the sender so that we can process this event
     // here and kill the process.
-    // TODO(earthdok): Re-enable on CrOS http://crbug.com/360622
-#if (defined(ADDRESS_SANITIZER) || defined(LEAK_SANITIZER) || \
-     defined(MEMORY_SANITIZER) || defined(THREAD_SANITIZER) || \
-     defined(UNDEFINED_SANITIZER)) && !defined(OS_CHROMEOS)
+#if defined(ADDRESS_SANITIZER) || defined(LEAK_SANITIZER) || \
+    defined(MEMORY_SANITIZER) || defined(THREAD_SANITIZER) || \
+    defined(UNDEFINED_SANITIZER)
     // Some sanitizer tools rely on exit handlers (e.g. to run leak detection,
     // or dump code coverage data to disk). Instead of exiting the process
     // immediately, we give it 60 seconds to run exit handlers.