Make it possibe to lock the fixedLayoutSize

public/web/WebView.h

Index: public/web/WebView.h
diff --git a/public/web/WebView.h b/public/web/WebView.h
index 36d38ca82043f99fdec97f4104647242c84da7ae..f52e4e2f88029d1c4fc974e753d7b49eed49e7ab 100644
--- a/public/web/WebView.h
+++ b/public/web/WebView.h
@@ -314,6 +314,7 @@ public:
     virtual WebSize fixedLayoutSize() const = 0;
     virtual void setFixedLayoutSize(const WebSize&) = 0;
 
+    virtual void setFixedLayoutSizeLock(bool) = 0;

[aelias_OOO_until_Jul13, 2013/09/06 23:11:18]

I looked at this more carefully and you don't need to add this new API.  Just
change the meaning of WebView::setFixedLayoutSize().  It has no real callers on
any platform at the moment.

When a Chromium-side caller calls setFixedLayoutSize, set your lock bool and the
FrameView fixedLayoutSize.  Clear the bool if it's called with WebSize(0,0).

And change the last line of WebViewImpl::updatePageDefinedPageScaleConstraints
to stop calling the API method and do instead:

if (!fixedLayoutSizeLock())
  frame->view()->setFixedLayoutSize(layoutSize);

So I'm proposing to redefine the concept of "fixed layout" to fit your use case
and mean literally that, the layout size is fixed from Chromium separately from
the view size and Blink never spontaneously changes it.

[mkosiba (inactive), 2013/09/10 09:11:31]

ah, cool!
Thanks for looking. I keep forgetting that these APIs might have been added for 
a different WebKit port and the fact that they're public doesn't neccessarily
mean that they're used in Chrome.

 
     // Auto-Resize -----------------------------------------------------------