cef/libcef
Marshall Greenblatt 7a56371b84 Fix draggable region update with BackForwardCache enabled (see issue #2421)
When BackForwardCache is enabled and the user navigates the main frame
back/forward a new RFH may be created for an existing main frame GlobalId value
and CefFrameHostImpl (e.g. an object that was previously Detach()ed after main
frame navigation called SetMainFrame, but for which RenderFrameDeleted was not
subsequently called due to insertion in the BackForwardCache). In this case we
can re-attach the new RFH to the existing main frame CefFrameHostImpl in
RenderFrameHostStateChanged and resume processing of messages.

Swapping back/forward to an existing (already loaded) renderer does not trigger
new notifications for draggable regions (e.g. RenderFrameObserver::
DraggableRegionsChanged is not called by default). We therefore explicitly
request an update of draggable regions by sending the DidStopLoading message to
the renderer.

A new |reattached| parameter is added to CefFrameHandler::OnFrameAttached to
support identification of BackForwardCache usage by the client.

To test with unit tests:
Run `ceftests --gtest_filter=DraggableRegionsTest.DraggableRegionsCrossOrigin
              --enable-features=BackForwardCache`

To test manually:
1. Run `cefclient --enable-features=BackForwardCache --use-views
   --url=http://tests/draggable`, note that draggable regions work.
2. Load https://www.google.com via the address bar, note that draggable regions
   are removed.
3. Go back to http://tests/draggable, note that draggable regions work.
4. Go forward to https://www.google.com, note that draggable regions are
   removed.
2021-09-16 18:25:43 +03:00
..
browser Fix draggable region update with BackForwardCache enabled (see issue #2421) 2021-09-16 18:25:43 +03:00
common views: Add support for absolute positioned overlay views. 2021-09-16 18:25:43 +03:00
features Create a ChromeBrowserHostImpl for every Chrome tab (see issue #2969) 2020-09-21 17:06:56 -04:00
renderer Fix draggable region update with BackForwardCache enabled (see issue #2421) 2021-09-16 18:25:43 +03:00
resources Mac: Update CFBundleIdentifier for the CEF framework 2021-08-11 12:38:43 -04:00