Fix window zoom in a sane way, remove nasty casts.

chrome/browser/tab_contents/tab_contents_view_mac.h

Index: chrome/browser/tab_contents/tab_contents_view_mac.h
diff --git a/chrome/browser/tab_contents/tab_contents_view_mac.h b/chrome/browser/tab_contents/tab_contents_view_mac.h
index 3e5b0384acd788228df1183e4b57fc719902f4ba..d8082fcca687d20315a9fb29181eb9fbb178b9f6 100644
--- a/chrome/browser/tab_contents/tab_contents_view_mac.h
+++ b/chrome/browser/tab_contents/tab_contents_view_mac.h
@@ -119,10 +119,6 @@ class TabContentsViewMac : public TabContentsView {
   void CloseTab();
 
   TabContents* tab_contents() { return tab_contents_; }
-  int preferred_width() const { return preferred_width_; }
-  void set_preferred_width(int preferred_width) {
-    preferred_width_ = preferred_width;
-  }
 
  private:
   // The TabContents whose contents we display.
@@ -141,9 +137,6 @@ class TabContentsViewMac : public TabContentsView {
   // The context menu. Callbacks are asynchronous so we need to keep it around.
   scoped_ptr<RenderViewContextMenuMac> context_menu_;
 
-  // The page content's intrinsic width.
-  int preferred_width_;
-
   // The overlaid view. Owned by the caller of |InstallOverlayView|; this is a
   // weak reference.
   NSView* overlaid_view_;