Begin abstracting sending of IPC from autofill core code.

components/autofill/core/browser/test_autofill_driver.cc

Index: components/autofill/core/browser/test_autofill_driver.cc
diff --git a/components/autofill/core/browser/test_autofill_driver.cc b/components/autofill/core/browser/test_autofill_driver.cc
index 5d642ee0164d78efc993f126077a77cd0ac62859..eabd42ee60953c086d177c0b83410ea05dc72810 100644
--- a/components/autofill/core/browser/test_autofill_driver.cc
+++ b/components/autofill/core/browser/test_autofill_driver.cc
@@ -15,4 +15,12 @@ content::WebContents* TestAutofillDriver::GetWebContents() {
   return web_contents();
 }
 
+bool TestAutofillDriver::RendererIsAvailable() {
+  return true;
+}
+
+void TestAutofillDriver::SendFormDataToRenderer(int query_id,
+                                                const FormData& form_data) {
+}
+
 }  // namespace autofill