[signin] Add DICe flow for account consistency requests.

components/signin/core/browser/signin_header_helper_unittest.cc

Index: components/signin/core/browser/signin_header_helper_unittest.cc
diff --git a/components/signin/core/browser/signin_header_helper_unittest.cc b/components/signin/core/browser/signin_header_helper_unittest.cc
index 92f4f29de941c04f2c075771bb0227d3b431eb49..4c0ef5de2a1949a2efe99ebad0822ff86d4e01bc 100644
--- a/components/signin/core/browser/signin_header_helper_unittest.cc
+++ b/components/signin/core/browser/signin_header_helper_unittest.cc
@@ -2,14 +2,18 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "components/signin/core/browser/signin_header_helper.h"
+
 #include <memory>
+#include <string>
 
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
+#include "build/build_config.h"
 #include "components/content_settings/core/browser/cookie_settings.h"
-#include "components/signin/core/browser/signin_header_helper.h"
 #include "components/signin/core/common/profile_management_switches.h"
 #include "components/sync_preferences/testing_pref_service_syncable.h"
+#include "google_apis/gaia/gaia_urls.h"
 #include "net/traffic_annotation/network_traffic_annotation_test_helper.h"
 #include "net/url_request/url_request_test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -39,9 +43,11 @@ class SigninHeaderHelperTest : public testing::Test {
               expected_request);
   }
 
-  void CheckMirrorHeaderRequest(const GURL& url,
-                                const std::string& account_id,
-                                const std::string& expected_request) {
+  void CheckAccountConsistencyHeaderRequest(
+      const GURL& url,
+      const std::string& account_id,
+      const char* header_name,
+      const std::string& expected_request) {
     bool expected_result = !expected_request.empty();
     std::unique_ptr<net::URLRequest> url_request =
         url_request_context_.CreateRequest(url, net::DEFAULT_PRIORITY, nullptr,
@@ -51,14 +57,27 @@ class SigninHeaderHelperTest : public testing::Test {
                   signin::PROFILE_MODE_DEFAULT),
               expected_result);
     std::string request;
-    EXPECT_EQ(url_request->extra_request_headers().GetHeader(
-                  signin::kChromeConnectedHeader, &request),
-              expected_result);
+    EXPECT_EQ(
+        url_request->extra_request_headers().GetHeader(header_name, &request),
+        expected_result);
     if (expected_result) {
       EXPECT_EQ(expected_request, request);
     }
   }
 
+  void CheckMirrorHeaderRequest(const GURL& url,
+                                const std::string& account_id,
+                                const std::string& expected_request) {
+    return CheckAccountConsistencyHeaderRequest(
+        url, account_id, signin::kChromeConnectedHeader, expected_request);
+  }
+
+  void CheckDiceHeaderRequest(const GURL& url,
+                              const std::string& expected_request) {
+    return CheckAccountConsistencyHeaderRequest(
+        url, "", signin::kChromeIDConsistencyRequestHeader, expected_request);
+  }
+
   base::MessageLoop loop_;
 
   sync_preferences::TestingPrefServiceSyncable prefs_;
@@ -118,6 +137,37 @@ TEST_F(SigninHeaderHelperTest, TestMirrorRequestGoogleCom) {
       "id=0123456789:mode=0:enable_account_consistency=true");
 }
 
+// Tests that the Mirror request is returned when the target is a Gaia URL, even
+// if account consistency is disabled.
+TEST_F(SigninHeaderHelperTest, TestMirrorRequestGaiaURL) {
+  ASSERT_FALSE(switches::IsAccountConsistencyMirrorEnabled());
+  CheckMirrorHeaderRequest(GURL("https://accounts.google.com"), "0123456789",
+                           "mode=0,enable_account_consistency=false");
+  CheckMirrorCookieRequest(
+      GURL("https://accounts.google.com"), "0123456789",
+      "id=0123456789:mode=0:enable_account_consistency=false");
+}
+
+// DICe is only supported on desktop.
+#if !defined(OS_ANDROID) && !defined(OS_IOS)
+// Tests that no DICe request is returned when the target is not a Gaia URL.
+TEST_F(SigninHeaderHelperTest, TestNoDiceRequestNoGaiaURL) {
+  switches::EnableAccountConsistencyDiceForTesting(
+      base::CommandLine::ForCurrentProcess());
+  CheckDiceHeaderRequest(GURL("https://docs.google.com"), "");
+}
+
+// Tests that a DICe request is returned when the target is a Gaia URL.
+TEST_F(SigninHeaderHelperTest, TestDiceRequestGaiaURL) {
+  switches::EnableAccountConsistencyDiceForTesting(
+      base::CommandLine::ForCurrentProcess());
+  std::string client_id = GaiaUrls::GetInstance()->oauth2_chrome_client_id();
+  ASSERT_FALSE(client_id.empty());
+  CheckDiceHeaderRequest(GURL("https://accounts.google.com"),
+                         "client_id=" + client_id);
+}
+#endif
+
 // Tests that the Mirror request is returned with the GAIA Id on Drive origin,
 // even if account consistency is disabled.
 //
@@ -125,7 +175,7 @@ TEST_F(SigninHeaderHelperTest, TestMirrorRequestGoogleCom) {
 // only relevant on Desktop.
 #if !defined(OS_ANDROID) && !defined(OS_IOS)
 TEST_F(SigninHeaderHelperTest, TestMirrorRequestDrive) {
-  DCHECK(!switches::IsAccountConsistencyMirrorEnabled());
+  ASSERT_FALSE(switches::IsAccountConsistencyMirrorEnabled());
   CheckMirrorHeaderRequest(
       GURL("https://docs.google.com/document"), "0123456789",
       "id=0123456789,mode=0,enable_account_consistency=false");