Fix crash caused by concurrent access to framebuffer_combo_complete_map_.

components/view_manager/gles2/command_buffer_driver.cc

Index: components/view_manager/gles2/command_buffer_driver.cc
diff --git a/components/view_manager/gles2/command_buffer_driver.cc b/components/view_manager/gles2/command_buffer_driver.cc
index 5a4ac83fb4943738eae6efe524845352e6ee23a7..82474429dd60def9bc02ec59ddb8a6323cee6e1d 100644
--- a/components/view_manager/gles2/command_buffer_driver.cc
+++ b/components/view_manager/gles2/command_buffer_driver.cc
@@ -117,8 +117,9 @@ bool CommandBufferDriver::DoInitialize(
   scoped_refptr<gpu::gles2::ContextGroup> context_group =
       new gpu::gles2::ContextGroup(
           gpu_state_->mailbox_manager(), new GpuMemoryTracker,
-          new gpu::gles2::ShaderTranslatorCache, nullptr, nullptr, nullptr,
-          bind_generates_resource);
+          new gpu::gles2::ShaderTranslatorCache,
+          new gpu::gles2::FramebufferCompletenessCache, nullptr, nullptr,
+          nullptr, bind_generates_resource);
 
   command_buffer_.reset(
       new gpu::CommandBufferService(context_group->transfer_buffer_manager()));