Move responsiblity of tab suspending from renderer to TabManager

content/public/test/mock_render_process_host.h

Index: content/public/test/mock_render_process_host.h
diff --git a/content/public/test/mock_render_process_host.h b/content/public/test/mock_render_process_host.h
index d50ca3de805830a27243983bad50212e5cf898f5..2a99f7bad5f482a3a9ba94d85fe2c1cb31ade2c2 100644
--- a/content/public/test/mock_render_process_host.h
+++ b/content/public/test/mock_render_process_host.h
@@ -145,6 +145,8 @@ class MockRenderProcessHost : public RenderProcessHost {
     service_registry_ = std::move(service_registry);
   }
 
+  void Suspend() override {}
+
  private:
   // Stores IPC messages that would have been sent to the renderer.
   IPC::TestSink sink_;