Add a force-layout-height-to-zero layout mode to WebViewImpl

public/web/WebView.h

Index: public/web/WebView.h
diff --git a/public/web/WebView.h b/public/web/WebView.h
index 6a046c7ad0b2ff940906242f3a9e2f262a711721..9d93227c44303bb05be254f748d10a281cbead34 100644
--- a/public/web/WebView.h
+++ b/public/web/WebView.h
@@ -289,6 +289,9 @@ public:
 
     // Fixed Layout --------------------------------------------------------
 
+    // Forces the main frame's layout size height to be 0.
+    virtual void setForceZeroLayoutHeight(bool enable) = 0;

[abarth-chromium, 2014/07/09 17:01:07]

This should be a WebSetting instead of being a member function of WebView.

[mkosiba (inactive), 2014/07/09 17:14:23]

I wanted to do that but I couldn't find a way to trigger a recalculation of the
viewport (which takes place in WebViewImpl) from WebSettings. The embedding
application can go in and out of this mode and when this is toggled I need to
force the layoutSize to be recalculated and set on the FrameView.

+
     // Locks main frame's layout size to specified size. Passing WebSize(0, 0)
     // removes the lock.
     virtual void setFixedLayoutSize(const WebSize&) = 0;