browser: implement multiple permission requesting

chrome/browser/permissions/permission_manager.h

Index: chrome/browser/permissions/permission_manager.h
diff --git a/chrome/browser/permissions/permission_manager.h b/chrome/browser/permissions/permission_manager.h
index a891dd8e0ebe6a00317aecbc7ac96c83a1de533b..db1d81be579a31a73fcc03deba270c31c3056c44 100644
--- a/chrome/browser/permissions/permission_manager.h
+++ b/chrome/browser/permissions/permission_manager.h
@@ -35,9 +35,17 @@ class PermissionManager : public KeyedService,
       content::RenderFrameHost* render_frame_host,
       const GURL& requesting_origin,
       bool user_gesture,
-      const base::Callback<void(content::PermissionStatus)>& callback) override;
+      const base::Callback<void(
+          content::PermissionStatus)>& callback) override;
+  int RequestPermissions(
+      const std::vector<content::PermissionType>& permissions,
+      content::RenderFrameHost* render_frame_host,
+      const GURL& requesting_origin,
+      bool user_gesture,
+      const base::Callback<void(
+          const std::vector<content::PermissionStatus>&)>& callback) override;
   void CancelPermissionRequest(content::RenderFrameHost* render_frame_host,
-                               int request_id) override;
+                                int request_id) override;
   void ResetPermission(content::PermissionType permission,
                        const GURL& requesting_origin,
                        const GURL& embedding_origin) override;
@@ -62,11 +70,24 @@ class PermissionManager : public KeyedService,
   struct Subscription;
   using SubscriptionsMap = IDMap<Subscription, IDMapOwnPointer>;
 
+  int RequestPermissionsInternal(
+      const std::vector<content::PermissionType>& permissions,
+      content::RenderFrameHost* render_frame_host,
+      const GURL& requesting_origin,
+      bool user_gesture,
+      const base::Callback<void(
+            const std::vector<content::PermissionStatus>&)>& callback);
+
   void OnPermissionRequestResponse(
       int request_id,
-      const base::Callback<void(content::PermissionStatus)>& callback,
+      int request_index,
       ContentSetting content_setting);
 
+  void OnPermissionRequestResponseInternal(
+      int request_id,
+      int request_index,
+      content::PermissionStatus status);
+
   // Not all WebContents are able to display permission requests. If the PBM
   // is required but missing for |web_contents|, don't pass along the request.
   bool IsPermissionBubbleManagerMissing(content::WebContents* web_contents);