fix: add patch to route mouse event navigations through the WebConten…

…tsDelegate (#22202)

patches/chromium/.patches

@@ -84,3 +84,4 @@ fix_use_the_new_mediaplaypause_key_listener_for_internal_chrome.patch
 fix_use_native_window_button_positions_when_macos_locale_is_rtl.patch
 use_electron_resources_in_pdf_util.patch
 hack_plugin_response_interceptor_to_point_to_electron.patch
+fix_route_mouse_event_navigations_through_the_web_contents_delegate.patch

patches/chromium/fix_route_mouse_event_navigations_through_the_web_contents_delegate.patch

@@ -0,0 +1,34 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Samuel Attard <sattard@slack-corp.com>
+Date: Fri, 14 Feb 2020 13:35:47 -0800
+Subject: fix: route mouse event navigations through the web_contents delegate
+
+This ensures that embedders can handle browser-side mouse navigations
+themselves.  We need this so that we can correctly ensure that processes
+are not restarted for in-document navigations.
+
+Refs: https://chromium-review.googlesource.com/c/chromium/src/+/1769525
+
+This patch can be removed once app.allowRendererProcessReuse is forced
+to true as then Chromiums assumptions around processes become correct.
+
+diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
+index 70d735dcc38734edaaf6221cd40c49beb6d2e37e..9cd7368966c20b9e9306c41e455c002d686d3013 100644
+--- a/content/browser/web_contents/web_contents_impl.cc
++++ b/content/browser/web_contents/web_contents_impl.cc
+@@ -2347,11 +2347,13 @@ bool WebContentsImpl::HandleMouseEvent(const blink::WebMouseEvent& event) {
+     WebContentsImpl* outermost = GetOutermostWebContents();
+     if (event.button == blink::WebPointerProperties::Button::kBack &&
+         outermost->controller_.CanGoBack()) {
+-      outermost->controller_.GoBack();
++      if (delegate_->OnGoToEntryOffset(-1))
++        outermost->controller_.GoBack();
+       return true;
+     } else if (event.button == blink::WebPointerProperties::Button::kForward &&
+                outermost->controller_.CanGoForward()) {
+-      outermost->controller_.GoForward();
++      if (delegate_->OnGoToEntryOffset(1))
++        outermost->controller_.GoForward();
+       return true;
+     }
+   }