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Remove usage of FrameTreeNode IDs (see issue #2421)

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With the introduction of prerendering in Chromium it is now possible for
RenderFrameHosts (RFH) to move between FrameTrees. As a consequence we can no
longer rely on FrameTreeNode IDs to uniquely identify a RFH over its lifespan.
We must now switch to using GlobalRenderFrameHostId (child_id, frame_routing_id)
instead for that purpose. Additionally, we simplify existing code by using the
GlobalRenderFrameHostId struct in all places that previously used a
(render_process_id, render_frame_id) pair, since these concepts are equivalent.

See https://crbug.com/1179502#c8 for additional background.
This commit is contained in:
Marshall Greenblatt
2021-08-19 17:07:44 -04:00
parent cfdec92624
commit 955097ea77
33 changed files with 506 additions and 781 deletions
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4
libcef/browser/frame_host_impl.h
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@ -128,10 +128,6 @@ class CefFrameHostImpl : public CefFrame, public cef::mojom::BrowserFrame {
absl::optional<std::vector<cef::mojom::DraggableRegionEntryPtr>> regions)
override;
static int64_t MakeFrameId(const content::RenderFrameHost* host);
static int64_t MakeFrameId(int32_t render_process_id,
int32_t render_routing_id);
static const int64_t kMainFrameId;
static const int64_t kFocusedFrameId;
static const int64_t kUnspecifiedFrameId;