PaymentHandler: Fix a typo (camelCase to hacker_case).

content/browser/payments/payment_app_provider_impl_unittest.cc

 // Copyright 2016 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 <cstddef>
 #include <string>
 #include <utility>
 
 #include "base/macros.h"
 #include "base/run_loop.h"
@@ skipping 117 matching lines @@
   }
 
   PaymentAppProvider::Manifests manifests;
   bool called = false;
   GetAllManifests(base::Bind(&GetAllManifestsCallback, &called, &manifests));
   ASSERT_TRUE(called);
   ASSERT_EQ(3U, manifests.size());
 
   payments::mojom::PaymentAppRequestPtr app_request =
       payments::mojom::PaymentAppRequest::New();
-  app_request->methodData.push_back(payments::mojom::PaymentMethodData::New());
+  app_request->method_data.push_back(payments::mojom::PaymentMethodData::New());
   app_request->total = payments::mojom::PaymentItem::New();
   app_request->total->amount = payments::mojom::PaymentCurrencyAmount::New();
 
   called = false;
   InvokePaymentApp(manifests[1].first, std::move(app_request),
                    base::Bind(&InvokePaymentAppCallback, &called));
   ASSERT_TRUE(called);
 
   EXPECT_EQ(manifests[1].first, last_sw_registration_id());
   EXPECT_EQ(GURL(kPaymentAppInfo[1].scopeUrl), last_sw_scope_url());
 }
 
 }  // namespace content