gpu: Add sync token dependencies to flush metadata.

gpu/command_buffer/tests/gl_manager.cc

Index: gpu/command_buffer/tests/gl_manager.cc
diff --git a/gpu/command_buffer/tests/gl_manager.cc b/gpu/command_buffer/tests/gl_manager.cc
index 73463f85ae88c4c271f8c9f6ac4bc0fd66fb56a1..63a96a14f5c5473785e87c6e3b39892bdf05a0b5 100644
--- a/gpu/command_buffer/tests/gl_manager.cc
+++ b/gpu/command_buffer/tests/gl_manager.cc
@@ -651,7 +651,9 @@ void GLManager::SignalSyncToken(const gpu::SyncToken& sync_token,
   callback.Run();
 }
 
-bool GLManager::CanWaitUnverifiedSyncToken(const gpu::SyncToken* sync_token) {
+void GLManager::WaitSyncToken(const gpu::SyncToken& sync_token) {}
+
+bool GLManager::CanWaitUnverifiedSyncToken(const gpu::SyncToken& sync_token) {
   return false;
 }