Compute pageScaleFactor on page so that fixed layout page fits width of window.

content/renderer/render_widget.h

Index: content/renderer/render_widget.h
diff --git a/content/renderer/render_widget.h b/content/renderer/render_widget.h
index 3bad78a5d109e9877a1035c282578a14e39d0517..0c2c37aa5aa9275edfcfa0a2c61bdd0bedd82cad 100644
--- a/content/renderer/render_widget.h
+++ b/content/renderer/render_widget.h
@@ -246,10 +246,15 @@ class RenderWidget : public IPC::Channel::Listener,
       gfx::Rect* location,
       gfx::Rect* clip);
 
+  // Gets the size of the document according to WebKit.
+  virtual gfx::Size GetContentSize();

[jam, 2011/09/02 17:11:41]

what's the point of adding these virtual methods to RenderWidget if they're only
useful for RenderView, and only RenderView calls these methods?

[Fady Samuel, 2011/09/08 23:46:39]

Done.

+  virtual float GetPageScaleFactor();
+
   // Gets the scroll offset of this widget, if this widget has a notion of
   // scroll offset.
   virtual gfx::Point GetScrollOffset();
 
+

[jam, 2011/09/02 17:11:41]

?

[Fady Samuel, 2011/09/08 23:46:39]

Done.

   // Sets the "hidden" state of this widget.  All accesses to is_hidden_ should
   // use this method so that we can properly inform the RenderThread of our
   // state.
@@ -425,6 +430,10 @@ class RenderWidget : public IPC::Channel::Listener,
   // Indicates if the next sequence of Char events should be suppressed or not.
   bool suppress_next_char_events_;
 
+  // Whether the page scale factor has been set by the page viewport tag or
+  // user. If not, we may choose to zoom out to fit all the content width.
+  bool page_scale_factor_set_;
+
   // Set to true if painting to the window is handled by the accelerated
   // compositor.
   bool is_accelerated_compositing_active_;