Support "learn more" link for EME in PermissionRequestManager code-path on Android

chrome/browser/permissions/grouped_permission_infobar_delegate_android.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 "chrome/browser/permissions/grouped_permission_infobar_delegate_android.h"
 
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/android/android_theme_resources.h"
 #include "chrome/browser/infobars/infobar_service.h"
 #include "chrome/browser/permissions/permission_prompt_android.h"
@@ skipping 70 matching lines @@
     permission_prompt_->Deny();
   }
   return true;
 }
 
 void GroupedPermissionInfoBarDelegate::InfoBarDismissed() {
   if (permission_prompt_)
     permission_prompt_->Closing();
 }
 
+base::string16 GroupedPermissionInfoBarDelegate::GetLinkText() const {
+  return permission_prompt_->GetLinkText();
+}
+
 GroupedPermissionInfoBarDelegate::GroupedPermissionInfoBarDelegate(
     PermissionPromptAndroid* permission_prompt,
     const GURL& requesting_origin)
     : requesting_origin_(requesting_origin),
       persist_(true),
       permission_prompt_(permission_prompt) {
   DCHECK(permission_prompt);
 }
 
 infobars::InfoBarDelegate::InfoBarIdentifier
@@ skipping 18 matching lines @@
     InfoBarButton button) const {
   if (PermissionCount() > 1) {
     return l10n_util::GetStringUTF16((button == BUTTON_OK) ? IDS_APP_OK
                                                            : IDS_APP_CANCEL);
   }
 
   return l10n_util::GetStringUTF16((button == BUTTON_OK) ? IDS_PERMISSION_ALLOW
                                                          : IDS_PERMISSION_DENY);
 }
 
+GURL GroupedPermissionInfoBarDelegate::GetLinkURL() const {
+  return permission_prompt_->GetLinkURL();
+}
+
 bool GroupedPermissionInfoBarDelegate::EqualsDelegate(
     infobars::InfoBarDelegate* delegate) const {
   // The PermissionRequestManager doesn't create duplicate infobars so a pointer
   // equality check is sufficient.
   return this == delegate;
 }