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

chrome/browser/permissions/permission_prompt_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/permission_prompt_android.h"
 
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/infobars/infobar_service.h"
 #include "chrome/browser/permissions/grouped_permission_infobar_delegate_android.h"
 #include "chrome/browser/permissions/permission_dialog_delegate.h"
 #include "chrome/browser/permissions/permission_request.h"
+#include "chrome/common/url_constants.h"
+#include "components/strings/grit/components_strings.h"
+#include "ui/base/l10n/l10n_util.h"
 
 PermissionPromptAndroid::PermissionPromptAndroid(
     content::WebContents* web_contents)
     : web_contents_(web_contents), delegate_(nullptr) {
   DCHECK(web_contents);
 }
 
 PermissionPromptAndroid::~PermissionPromptAndroid() {}
 
 void PermissionPromptAndroid::SetDelegate(Delegate* delegate) {
@@ skipping 100 matching lines @@
   return requests[position]->GetMessageText();
 }
 
 base::string16 PermissionPromptAndroid::GetMessageTextFragment(
     size_t position) const {
   const std::vector<PermissionRequest*>& requests = delegate_->Requests();
   DCHECK_LT(position, requests.size());
   return requests[position]->GetMessageTextFragment();
 }
 
+base::string16 PermissionPromptAndroid::GetLinkText() const {
+  if (GetContentSettingType(0) ==
+      CONTENT_SETTINGS_TYPE_PROTECTED_MEDIA_IDENTIFIER) {
+    return l10n_util::GetStringUTF16(IDS_LEARN_MORE);
+  }
+  return base::string16();
+}
+
+GURL PermissionPromptAndroid::GetLinkURL() const {
+  if (GetContentSettingType(0) ==
+      CONTENT_SETTINGS_TYPE_PROTECTED_MEDIA_IDENTIFIER) {
+    return GURL(chrome::kEnhancedPlaybackNotificationLearnMoreURL);
+  }
+  return GURL();
+}
+
 // static
 std::unique_ptr<PermissionPrompt> PermissionPrompt::Create(
     content::WebContents* web_contents) {
   return base::MakeUnique<PermissionPromptAndroid>(web_contents);
 }