Begin abstracting sending of IPC from autofill core code.

components/autofill/core/browser/test_autofill_driver.h

Index: components/autofill/core/browser/test_autofill_driver.h
diff --git a/components/autofill/core/browser/test_autofill_driver.h b/components/autofill/core/browser/test_autofill_driver.h
index b63b7a487fa5543361be2e374cd089c4313bf698..b2362d93c27fc5064331cc867452ba700819e343 100644
--- a/components/autofill/core/browser/test_autofill_driver.h
+++ b/components/autofill/core/browser/test_autofill_driver.h
@@ -9,6 +9,7 @@
 #include "base/compiler_specific.h"
 #include "components/autofill/core/browser/autofill_driver.h"
 #include "content/public/browser/web_contents_observer.h"
+#include "testing/gmock/include/gmock/gmock.h"
 
 namespace autofill {
 
@@ -24,6 +25,10 @@ class TestAutofillDriver : public AutofillDriver,
 
   // AutofillDriver implementation.
   virtual content::WebContents* GetWebContents() OVERRIDE;
+  virtual bool CanSendToRenderer() OVERRIDE;
+
+  // Mock methods to enable testability.
+  MOCK_METHOD2(SendFormDataToRenderer, void(int query_id, FormData data));
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TestAutofillDriver);