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Move message routing from CefBrowser to CefFrame (see issue #2498).
This change moves the SendProcessMessage method from CefBrowser to CefFrame and adds CefBrowser parameters to OnProcessMessageReceived and OnDraggableRegionsChanged. The internal implementation has changed as follows: - Frame IDs are now a 64-bit combination of the 32-bit render_process_id and render_routing_id values that uniquely identify a RenderFrameHost (RFH). - CefFrameHostImpl objects are now managed by CefBrowserInfo with life span tied to RFH expectations. Specifically, a CefFrameHostImpl object representing a sub-frame will be created when a RenderFrame is created in the renderer process and detached when the associated RenderFrame is deleted or the renderer process in which it runs has died. - The CefFrameHostImpl object representing the main frame will always be valid but the underlying RFH (and associated frame ID) may change over time as a result of cross-origin navigations. Despite these changes calling LoadURL on the main frame object in the browser process will always navigate as expected. - Speculative RFHs, which may be created as a result of a cross-origin navigation and discarded if that navigation is not committed, are now handled correctly (e.g. ignored in most cases until they're committed). - It is less likely, but still possible, to receive a CefFrame object with an invalid frame ID (ID < 0). This can happen in cases where a RFH has not yet been created for a sub-frame. For example, when OnBeforeBrowse is called before initiating navigation in a previously nonexisting sub-frame. To test: All tests pass with NetworkService enabled and disabled.
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@ -36,9 +36,10 @@ content::WebContents* GetOwnerForGuestContents(content::WebContents* guest);
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// routing IDs, if any. |is_guest_view| will be set to true if the IDs
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// match a guest view associated with the returned browser instead of the
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// browser itself.
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CefRefPtr<CefBrowserHostImpl> GetOwnerBrowserForFrame(int render_process_id,
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int render_routing_id,
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bool* is_guest_view);
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CefRefPtr<CefBrowserHostImpl> GetOwnerBrowserForFrameRoute(
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int render_process_id,
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int render_routing_id,
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bool* is_guest_view);
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// Returns the CefBrowserHostImpl that owns the specified |host|, if any.
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// |is_guest_view| will be set to true if the host matches a guest view
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