chromeos: Refactor shelf to create ShelfView earlier in startup

chrome/browser/chromeos/accessibility/chromevox_panel.h

Index: chrome/browser/chromeos/accessibility/chromevox_panel.h
diff --git a/chrome/browser/chromeos/accessibility/chromevox_panel.h b/chrome/browser/chromeos/accessibility/chromevox_panel.h
index 8748e37121e8f2b8fc758e6d5384d3fbc112e09f..46ac85767749fca2942a1e4237597529487dabdb 100644
--- a/chrome/browser/chromeos/accessibility/chromevox_panel.h
+++ b/chrome/browser/chromeos/accessibility/chromevox_panel.h
@@ -33,6 +33,7 @@ class ChromeVoxPanel : public views::WidgetDelegate,
   void Close();
   void DidFirstVisuallyNonEmptyPaint();
   void UpdatePanelHeight();
+  void ResetPanelHeight();
   void EnterFullscreen();
   void ExitFullscreen();
   void DisableSpokenFeedback();
@@ -54,6 +55,10 @@ class ChromeVoxPanel : public views::WidgetDelegate,
   bool for_blocked_user_session() const { return for_blocked_user_session_; }
 
  private:
+  // Sends the height of the ChromeVox panel, which takes away space from the
+  // available window manager work area at the top of the screen.
+  void SendPanelHeightToAsh(int panel_height);
+
   views::Widget* widget_;
   std::unique_ptr<ChromeVoxPanelWebContentsObserver> web_contents_observer_;
   views::View* web_view_;