Use multiple WebKit web processes.

A new feature for WebKit2GTK+ 2.4, we can now specify to use multiple
webkit web processes rather than all webviews sharing the same
process.

If a tab's web process is not shared with any other's (although
currently unimplemented, this may happen when a tab is opened by
another webview, either through javascript or middle-clicking a
hyperlink), killing or crashing that web process only results in one
broken tab rather than crashing the entire browser (WebKit1) or
breaking every tab (WebKit2GTK+ <= 2.2).

xombrero.go

@@ -5,8 +5,10 @@
 package main
 
 import (
- "github.com/conformal/gotk3/gtk"
  "runtime"
+
+ "github.com/conformal/gotk3/gtk"
+ "github.com/jrick/go-webkit2/wk2"
 )
 
 const HomePage HTMLPageDescription = "https://www.duckduckgo.com/lite"
@@ -30,8 +32,10 @@ func RunGUI() {
  window.SetDefaultGeometry(defaultWinWidth, defaultWinHeight)
  window.Show()
 
- session := []PageDescription{HomePage}
+ wc := wk2.DefaultWebContext()
+ wc.SetProcessModel(wk2.ProcessModelMultipleSecondaryProcesses)
 
+ session := []PageDescription{HomePage}
  pm := NewPageManager(session)
  window.Add(pm)
  pm.Show()