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 06b238d0ab7326d2e614994073b2a5ec0c29ab0e..849cf7cbb7888de5c31a4cd8994f69c16b382b47 100644
--- a/gpu/command_buffer/tests/gl_manager.cc
+++ b/gpu/command_buffer/tests/gl_manager.cc
@@ -621,7 +621,9 @@ void GLManager::SignalSyncToken(const gpu::SyncToken& sync_token,
   }
 }
 
-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;
 }