Fix "More info" link in echo dialog pointing to deprecated Help app

Change-Id: Iaadb846eae348b95ce5f71be17f97761af220821
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2404283
Commit-Queue: Michael Cui <mlcui@google.com>
Reviewed-by: Rachel Carpenter <carpenterr@chromium.org>
Reviewed-by: Karan Bhatia <karandeepb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#816450}

chrome/browser/chromeos/extensions/echo_private_api.cc

@@ -25,6 +25,7 @@
 #include "chrome/browser/ui/browser_navigator_params.h"
 #include "chrome/common/extensions/api/echo_private.h"
 #include "chrome/common/pref_names.h"
+#include "chrome/common/url_constants.h"
 #include "chromeos/system/statistics_provider.h"
 #include "components/prefs/pref_registry_simple.h"
 #include "components/prefs/pref_service.h"
@@ -36,15 +37,6 @@
 
 namespace echo_api = extensions::api::echo_private;
 
-namespace {
-
-// URL of "More info" link shown in echo dialog in GetUserConsent function.
-const char kMoreInfoLink[] =
-    "chrome-extension://honijodknafkokifofgiaalefdiedpko/main.html?"
-    "answer=2677280";
-
-}  // namespace
-
 namespace chromeos {
 
 namespace echo_offer {
@@ -213,7 +205,7 @@ void EchoPrivateGetUserConsentFunction::OnCancel() {
 
 void EchoPrivateGetUserConsentFunction::OnMoreInfoLinkClicked() {
   ChromeExtensionFunctionDetails details(this);
-  NavigateParams params(details.GetProfile(), GURL(kMoreInfoLink),
+  NavigateParams params(details.GetProfile(), GURL(chrome::kEchoLearnMoreURL),
                         ui::PAGE_TRANSITION_LINK);
   // Open the link in a new window. The echo dialog is modal, so the current
   // window is useless until the dialog is closed.

chrome/common/url_constants.cc

@@ -346,6 +346,9 @@ const char kCupsPrintPPDLearnMoreURL[] =
 const char kEasyUnlockLearnMoreUrl[] =
     "https://support.google.com/chromebook/?p=smart_lock";
 
+const char kEchoLearnMoreURL[] =
+    "chrome://help-app/help/sub/3399709/id/2703646";
+
 const char kArcTermsPathFormat[] = "arc_tos/%s/terms.html";
 
 const char kArcPrivacyPolicyPathFormat[] = "arc_tos/%s/privacy_policy.pdf";

chrome/common/url_constants.h

@@ -304,6 +304,9 @@ extern const char kCupsPrintPPDLearnMoreURL[];
 // The URL for the "Learn more" link the the Easy Unlock settings.
 extern const char kEasyUnlockLearnMoreUrl[];
 
+// The URL for the help center article about redeeming Chromebook offers.
+extern const char kEchoLearnMoreURL[];
+
 // The URL for EOL notification
 extern const char kEolNotificationURL[];