[Autofill] Sanitize all data that comes in over IPC.

components/autofill/content/browser/request_autocomplete_manager.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/autofill/content/browser/request_autocomplete_manager.h"
 
 #include "components/autofill/content/browser/autofill_driver_impl.h"
 #include "components/autofill/content/common/autofill_messages.h"
 #include "components/autofill/core/browser/form_structure.h"
+#include "components/autofill/core/common/autofill_data_validation.h"
 #include "components/autofill/core/common/form_data.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
 #include "url/gurl.h"
 
 namespace autofill {
 
 RequestAutocompleteManager::RequestAutocompleteManager(
     AutofillDriverImpl* autofill_driver)
     : autofill_driver_(autofill_driver),
       weak_ptr_factory_(this) {
   DCHECK(autofill_driver_);
 }
 
 RequestAutocompleteManager::~RequestAutocompleteManager() {}
 
 void RequestAutocompleteManager::OnRequestAutocomplete(
     const FormData& form,
     const GURL& frame_url) {
+  if (!IsValidFormData(form))
+    return;
+
   if (!autofill_driver_->autofill_manager()->IsAutofillEnabled()) {
     ReturnAutocompleteResult(
         blink::WebFormElement::AutocompleteResultErrorDisabled,
         FormData());
     return;
   }
 
   base::Callback<void(const FormStructure*)> callback =
       base::Bind(&RequestAutocompleteManager::ReturnAutocompleteData,
                  weak_ptr_factory_.GetWeakPtr());
@@ skipping 32 matching lines @@
 void RequestAutocompleteManager::ShowRequestAutocompleteDialog(
     const FormData& form,
     const GURL& source_url,
     const base::Callback<void(const FormStructure*)>& callback) {
   AutofillManagerDelegate* delegate =
       autofill_driver_->autofill_manager()->delegate();
   delegate->ShowRequestAutocompleteDialog(form, source_url, callback);
 }
 
 }  // namespace autofill