History sub menu item for all tabs from other synced devices

app/brave_generated_resources.grd

@@ -172,6 +172,9 @@
       <message name="IDS_OPEN_GUEST_PROFILE" desc="The app menu item to create a new User Profile">
         Open Guest Window
       </message>
+      <message name="IDS_OPEN_MORE_OTHER_DEVICES_SESSIONS" desc="The history sub-menu item to show sessions from other devices">
+        More...
+      </message>
       <message name="IDS_EXTENSION_CANT_INSTALL_ON_BRAVE" desc="Error message when user tries to install an extension that is not allowed in Brave.">
         <ph name="EXTENSION_NAME">$1</ph> (extension ID "<ph name="EXTENSION_ID">$2<ex>abacabadabacabaeabacabadabacabaf</ex></ph>") is not allowed in Brave.
       </message>

chromium_src/chrome/browser/ui/toolbar/recent_tabs_sub_menu_model.cc

@@ -0,0 +1,46 @@
+/* Copyright (c) 2020 The Brave Authors. All rights reserved.
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <limits>
+
+#include "chrome/browser/ui/singleton_tabs.h"
+
+namespace {
+
+const char kBraveStubSessionTag[] = "brave_stub_more_session_tag";
+const char kBraveSyncedTabsUrl[] = "brave://history/syncedTabs";
+const int kStubTabId = std::numeric_limits<int32_t>::max() - 1;
+
+}  //  namespace
+
+#define BRAVE_EXECUTE_COMMAND                                                \
+  if (item.session_tag == kBraveStubSessionTag) {                            \
+    ShowSingletonTabOverwritingNTP(                                          \
+        browser_,                                                            \
+        GetSingletonTabNavigateParams(browser_, GURL(kBraveSyncedTabsUrl))); \
+    return;                                                                  \
+  }
+
+#define BRAVE_BUILD_TABS_FROM_OTHER_DEVICES                                 \
+  if (tabs_in_session.size() > kMaxTabsPerSessionToShow) {                  \
+    /* Not all the tabs are shown in menu */                                \
+    if (!stub_tab_.get()) {                                                 \
+      stub_tab_.reset(new sessions::SessionTab());                          \
+      sessions::SerializedNavigationEntry stub_nav_entry;                   \
+      stub_nav_entry.set_title(                                             \
+          l10n_util::GetStringUTF16(IDS_OPEN_MORE_OTHER_DEVICES_SESSIONS)); \
+      stub_nav_entry.set_virtual_url(GURL(kBraveSyncedTabsUrl));            \
+      stub_tab_->navigations.push_back(stub_nav_entry);                     \
+      stub_tab_->tab_id = SessionID::FromSerializedValue(kStubTabId);       \
+    }                                                                       \
+    tabs_in_session[kMaxTabsPerSessionToShow] = stub_tab_.get();            \
+    BuildOtherDevicesTabItem(kBraveStubSessionTag,                          \
+                             *tabs_in_session[kMaxTabsPerSessionToShow]);   \
+  }
+
+#include "../../../../../../chrome/browser/ui/toolbar/recent_tabs_sub_menu_model.cc"
+
+#undef BRAVE_BUILD_TABS_FROM_OTHER_DEVICES
+#undef BRAVE_EXECUTE_COMMAND

chromium_src/chrome/browser/ui/toolbar/recent_tabs_sub_menu_model.h

@@ -0,0 +1,19 @@
+/* Copyright (c) 2020 The Brave Authors. All rights reserved.
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef BRAVE_CHROMIUM_SRC_CHROME_BROWSER_UI_TOOLBAR_RECENT_TABS_SUB_MENU_MODEL_H_
+#define BRAVE_CHROMIUM_SRC_CHROME_BROWSER_UI_TOOLBAR_RECENT_TABS_SUB_MENU_MODEL_H_
+
+#define BRAVE_RECENT_TABS_SUB_MENU_MODEL_H_ \
+  private: \
+    std::auto_ptr<sessions::SessionTab> stub_tab_; \
+  public:
+// define BRAVE_RECENT_TABS_SUB_MENU_MODEL_H_
+
+#include "../../../../../../chrome/browser/ui/toolbar/recent_tabs_sub_menu_model.h"
+
+#undef BRAVE_RECENT_TABS_SUB_MENU_MODEL_H_
+
+#endif  // BRAVE_CHROMIUM_SRC_CHROME_BROWSER_UI_TOOLBAR_RECENT_TABS_SUB_MENU_MODEL_H_

patches/chrome-browser-ui-toolbar-recent_tabs_sub_menu_model.cc.patch

@@ -0,0 +1,20 @@
+diff --git a/chrome/browser/ui/toolbar/recent_tabs_sub_menu_model.cc b/chrome/browser/ui/toolbar/recent_tabs_sub_menu_model.cc
+index 8cdfc6fbdddcb13bcd5e198cd6ebf53abfb0269d..d9102ed0aedb4d7c5561438715ec4fa277fc3cde 100644
+--- a/chrome/browser/ui/toolbar/recent_tabs_sub_menu_model.cc
++++ b/chrome/browser/ui/toolbar/recent_tabs_sub_menu_model.cc
+@@ -270,6 +270,7 @@ void RecentTabsSubMenuModel::ExecuteCommand(int command_id, int event_flags) {
+     const TabNavigationItem& item = (*tab_items)[tab_items_idx];
+     DCHECK(item.tab_id.is_valid() && item.url.is_valid());
+
++    BRAVE_EXECUTE_COMMAND
+     if (item.session_tag.empty()) {  // Restore tab of local session.
+       if (service && context) {
+         base::RecordAction(
+@@ -479,6 +480,7 @@ void RecentTabsSubMenuModel::BuildTabsFromOtherDevices() {
+       BuildOtherDevicesTabItem(session_tag, *tabs_in_session[k]);
+     }  // for all tabs in one session
+
++    BRAVE_BUILD_TABS_FROM_OTHER_DEVICES
+     ++num_sessions_added;
+   }  // for all sessions
+

patches/chrome-browser-ui-toolbar-recent_tabs_sub_menu_model.h.patch

@@ -0,0 +1,12 @@
+diff --git a/chrome/browser/ui/toolbar/recent_tabs_sub_menu_model.h b/chrome/browser/ui/toolbar/recent_tabs_sub_menu_model.h
+index 911131f854b202f2aa8b48377d7e287ce27c652b..46aee818d4872246cc531a78fcace8b2fa25cb15 100644
+--- a/chrome/browser/ui/toolbar/recent_tabs_sub_menu_model.h
++++ b/chrome/browser/ui/toolbar/recent_tabs_sub_menu_model.h
+@@ -75,6 +75,7 @@ class RecentTabsSubMenuModel : public ui::SimpleMenuModel,
+   bool GetURLAndTitleForItemAtIndex(int index,
+                                     std::string* url,
+                                     base::string16* title);
++  BRAVE_RECENT_TABS_SUB_MENU_MODEL_H_
+
+  private:
+   struct TabNavigationItem;