[signin] Update OAuth multilogin parameter name

The parameter has changed on the Gaia server from mlreuse to
reuseCookies.

Fixed: 1072463
Change-Id: I5d1d889b14c3229f55d1638dbb4f2f07bc7622df
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2249958Reviewed-by: Monica Basta <msalama@chromium.org>
Commit-Queue: David Roger <droger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#779740}

components/signin/internal/identity_manager/oauth_multilogin_helper_unittest.cc

@@ -205,12 +205,12 @@ class OAuthMultiloginHelperTest
 
   std::string multilogin_url() const {
     return GaiaUrls::GetInstance()->oauth_multilogin_url().spec() +
-           "?source=ChromiumBrowser&mlreuse=0";
+           "?source=ChromiumBrowser&reuseCookies=0";
   }
 
   std::string multilogin_url_with_external_cc_result() const {
     return GaiaUrls::GetInstance()->oauth_multilogin_url().spec() +
-           "?source=ChromiumBrowser&mlreuse=0&externalCcResult=" +
+           "?source=ChromiumBrowser&reuseCookies=0&externalCcResult=" +
            kExternalCcResult;
   }
 

components/signin/public/identity_manager/accounts_cookie_mutator_unittest.cc

@@ -117,7 +117,7 @@ class AccountsCookieMutatorTest
         GetTestURLLoaderFactory()->AddResponse(
             GaiaUrls::GetInstance()
                 ->oauth_multilogin_url()
-                .Resolve(base::StringPrintf("?source=%s&mlreuse=0",
+                .Resolve(base::StringPrintf("?source=%s&reuseCookies=0",
                                             GaiaConstants::kChromeSource))
                 .spec(),
             std::string(kTestOAuthMultiLoginResponse), net::HTTP_OK);

google_apis/gaia/gaia_auth_fetcher.cc

@@ -803,7 +803,7 @@ void GaiaAuthFetcher::StartOAuthMultilogin(
 
   std::string source_string = net::EscapeUrlEncodedData(source_, true);
   std::string parameters = base::StringPrintf(
-      "?source=%s&mlreuse=%i", source_string.c_str(),
+      "?source=%s&reuseCookies=%i", source_string.c_str(),
       mode == gaia::MultiloginMode::MULTILOGIN_PRESERVE_COOKIE_ACCOUNTS_ORDER
           ? 1
           : 0);

google_apis/gaia/gaia_auth_fetcher_unittest.cc

@@ -355,7 +355,7 @@ TEST_F(GaiaAuthFetcherTest, MultiloginRequestFormat) {
   std::string header;
   request0.headers.GetHeader("Authorization", &header);
   EXPECT_EQ("MultiBearer id1:token1,id2:token2", header);
-  EXPECT_EQ("source=ChromiumBrowser&mlreuse=0&externalCcResult=cc_result",
+  EXPECT_EQ("source=ChromiumBrowser&reuseCookies=0&externalCcResult=cc_result",
             request0.url.query());
 
   auth.TestOnURLLoadCompleteInternal(net::OK, net::HTTP_OK, std::string());
@@ -367,7 +367,7 @@ TEST_F(GaiaAuthFetcherTest, MultiloginRequestFormat) {
   ASSERT_TRUE(auth.HasPendingFetch());
 
   const network::ResourceRequest& request1 = received_requests_.at(1);
-  EXPECT_EQ("source=ChromiumBrowser&mlreuse=1&externalCcResult=cc_result",
+  EXPECT_EQ("source=ChromiumBrowser&reuseCookies=1&externalCcResult=cc_result",
             request1.url.query());
 }