Implement blink::Platform::yieldCurrentThread()

mojo/services/html_viewer/blink_platform_impl.cc

Index: mojo/services/html_viewer/blink_platform_impl.cc
diff --git a/mojo/services/html_viewer/blink_platform_impl.cc b/mojo/services/html_viewer/blink_platform_impl.cc
index 315a850db217211f48bd00116b52a23d1c146a21..8a7555b6a77727e70b5cb639b17d589ec5c6b90e 100644
--- a/mojo/services/html_viewer/blink_platform_impl.cc
+++ b/mojo/services/html_viewer/blink_platform_impl.cc
@@ -9,6 +9,7 @@
 #include "base/rand_util.h"
 #include "base/stl_util.h"
 #include "base/synchronization/waitable_event.h"
+#include "base/threading/platform_thread.h"
 #include "base/time/time.h"
 #include "mojo/public/cpp/application/application_impl.h"
 #include "mojo/services/html_viewer/webclipboard_impl.h"
@@ -221,6 +222,10 @@ blink::WebThread* BlinkPlatformImpl::currentThread() {
   return thread;
 }
 
+void BlinkPlatformImpl::yieldCurrentThread() {
+  base::PlatformThread::YieldCurrentThread();
+}
+
 blink::WebWaitableEvent* BlinkPlatformImpl::createWaitableEvent() {
   return new WebWaitableEventImpl();
 }