Adds ability to render omnibox as a view above the page.

chrome/browser/ui/views/frame/contents_container.h

Index: chrome/browser/ui/views/frame/contents_container.h
diff --git a/chrome/browser/ui/views/frame/contents_container.h b/chrome/browser/ui/views/frame/contents_container.h
index 4e6ab7ab3188d30a53da383fad50d1919bf8a97b..f931357c3041fe3f309e00c29e381d4118ed4597 100644
--- a/chrome/browser/ui/views/frame/contents_container.h
+++ b/chrome/browser/ui/views/frame/contents_container.h
@@ -23,6 +23,12 @@ class ContentsContainer : public views::View {
   explicit ContentsContainer(views::View* active);
   virtual ~ContentsContainer();
 
+  // View positioned above the contents. The returned view is owned by this.
+  // The header is sized to the preferred height of its single child (width
+  // fills the available width). If the child is not visible the header is
+  // sized to an empty rect.
+  views::View* header();
+
   // Makes the preview view the active view and nulls out the old active view.
   // It's assumed the caller will delete or remove the old active view
   // separately.
@@ -48,6 +54,9 @@ class ContentsContainer : public views::View {
   virtual std::string GetClassName() const OVERRIDE;
 
  private:
+  class HeaderView;
+
+  HeaderView* header_;
   views::View* active_;
   views::View* preview_;
   content::WebContents* preview_web_contents_;