Change panels to be able to turn off autoresize.

chrome/browser/ui/panels/panel_strip.h

Index: chrome/browser/ui/panels/panel_strip.h
diff --git a/chrome/browser/ui/panels/panel_strip.h b/chrome/browser/ui/panels/panel_strip.h
index 7b0bced6fc2a6b29013fbc85f8db791ffa6d87dd..ce8930fcee0f5408dd75af50eeaa73f13934362b 100644
--- a/chrome/browser/ui/panels/panel_strip.h
+++ b/chrome/browser/ui/panels/panel_strip.h
@@ -21,6 +21,11 @@ class PanelStrip {
     IN_OVERFLOW,  // panels that cannot fit in the 'docked' panels area
   };
 
+  enum AutoResizeState {
+    AUTORESIZE_ENABLED,
+    AUTORESIZE_DISABLED,
+  };
+
   Type type() const { return type_; }
 
   // Sets the bounds of the panel strip.
@@ -48,7 +53,8 @@ class PanelStrip {
   // the content area, and is in screen coordinates.
   // The preferred size may be adjusted to fit layout constraints.
   virtual void ResizePanelWindow(Panel* panel,
-                                 const gfx::Size& preferred_window_size) = 0;
+                                 const gfx::Size& preferred_window_size,
+                                 AutoResizeState auto_resize_state) = 0;
 
   // Invoked when the draw attention state of the panel has changed.
   // Subclass should update the display of the panel to match the new