[Chromium] Record history

GeckoSession uses a HistoryDelegate object (provided by Wolvic) to
keep track of history changes. In the case of Chromium the concept
is different. We can listen to the events dispatched by the
WebContents object and manyally call the HistoryDelegate to record
changes in the history. That way we don't need to change anything
in the Gecko port and we get history support in Chromium.

app/src/common/chromium/com/igalia/wolvic/browser/api/impl/TabWebContentsObserver.java

@@ -57,6 +57,22 @@ public void didStartNavigationInPrimaryMainFrame(NavigationHandle navigationHand
                 navigationHandle.hasUserGesture(), navigationHandle.isRendererInitiated()));
     }
 
+    private int toWSessionOnVisitedFlags(NavigationHandle navigationHandle) {
+        int flags = 0;
+        // TODO: get different types of redirection.
+        if (navigationHandle.isInPrimaryMainFrame())
+            flags |= WSession.HistoryDelegate.VISIT_TOP_LEVEL;
+        if (navigationHandle.isRedirect()) {
+            int statusCode = navigationHandle.httpStatusCode();
+            flags |= (statusCode == 301 || statusCode == 308) ?
+                    WSession.HistoryDelegate.VISIT_REDIRECT_SOURCE_PERMANENT :
+                    WSession.HistoryDelegate.VISIT_REDIRECT_SOURCE;
+        }
+        if (navigationHandle.isErrorPage())
+            flags |= WSession.HistoryDelegate.VISIT_UNRECOVERABLE_ERROR;
+        return flags;
+    }
+
     /**
      * Called when the navigation is committed. The commit can be an error page if the server
      * responded with an error code or a successful document. See also:
@@ -65,16 +81,20 @@ public void didStartNavigationInPrimaryMainFrame(NavigationHandle navigationHand
      */
     @Override
     public void didFinishNavigationInPrimaryMainFrame(NavigationHandle navigationHandle) {
-        WSession.NavigationDelegate delegate = mSession.getNavigationDelegate();
-        if (delegate == null)
+        WSession.NavigationDelegate navigationDelegate = mSession.getNavigationDelegate();
+        if (navigationDelegate == null)
             return;
 
         if (navigationHandle.isErrorPage()) {
             didFailLoad(true, navigationHandle.errorCode(), navigationHandle.getUrl(), 0);
             return;
         }
 
-        delegate.onLocationChange(mSession, navigationHandle.getUrl().getSpec());
+        navigationDelegate.onLocationChange(mSession, navigationHandle.getUrl().getSpec());
+        WSession.HistoryDelegate historyDelegate = mSession.getHistoryDelegate();
+        if (historyDelegate != null) {
+            historyDelegate.onVisited(mSession, navigationHandle.getUrl().getSpec(), navigationHandle.getReferrerUrl().getSpec(), toWSessionOnVisitedFlags(navigationHandle));
+        }
     }
 
     @Override