Move the ViewType enum to extensions\common.

chrome/browser/ui/gtk/extensions/extension_view_gtk.cc

Index: chrome/browser/ui/gtk/extensions/extension_view_gtk.cc
===================================================================
--- chrome/browser/ui/gtk/extensions/extension_view_gtk.cc	(revision 191609)
+++ chrome/browser/ui/gtk/extensions/extension_view_gtk.cc	(working copy)
@@ -6,11 +6,11 @@
 
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/browser/ui/gtk/extensions/extension_popup_gtk.h"
-#include "chrome/common/view_type.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_view.h"
+#include "extensions/common/view_type.h"
 
 ExtensionViewGtk::ExtensionViewGtk(extensions::ExtensionHost* extension_host,
                                    Browser* browser)
@@ -54,8 +54,8 @@
     pending_background_.reset();
   }
 
-  chrome::ViewType host_type = extension_host_->extension_host_type();
-  if (host_type == chrome::VIEW_TYPE_EXTENSION_POPUP) {
+  extensions::ViewType host_type = extension_host_->extension_host_type();
+  if (host_type == extensions::VIEW_TYPE_EXTENSION_POPUP) {
     gfx::Size min_size(ExtensionPopupGtk::kMinWidth,
                        ExtensionPopupGtk::kMinHeight);
     gfx::Size max_size(ExtensionPopupGtk::kMaxWidth,