DOMUI implementation of Menu2.

 A few key design points.
 * Uses DOMView to render menu content.
 * MenuUI (subclass of DOMUI) uses GtkWiget tree to access
    WidgetGtk and MenuModel. Alternative way was to change
    TabContents::GetDOMUIForCurrentState() public and pass them throught it, but this seems to work fine.
 * Input/Focus is controlled by gtk_grab_add. Input is grabbed by the root widget, and then sent to each active menu widget via gtk_grab_add.
  * Menu gets shown after the renderer rendered the content
    (thus has some size) to avoid showing small/empty menu.
    Mouse processing is blocked until the menu is shown (see Dispatcher).

 A few issues that will be addressed in separate CL
  * RTL (will be after beta)
  * menu scroll. working on it now.
  * menu sometimes show scroll bar. (I just need to disable it)
  * unit test for native_menu_domui

BUG=chromiun-os:6497
TEST=manual for now. all menu2 based meus should work as before (web pages's context menu, system menu, forward/back menu and several chromeos specific one) except for following two:
 * mnemonic should work now on context menus.
 * menu larger than screen does not scroll. I'll implement this in separate CL

Review URL: http://codereview.chromium.org/3442018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@61445 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 1 insertions, 0 deletions

diff --git a/chrome/common/url_constants.h b/chrome/common/url_constants.h
index ecde9ee..b7d56b9 100644
--- a/chrome/common/url_constants.h
+++ b/chrome/common/url_constants.h
@@ -113,6 +113,7 @@ extern const char kChromeUISettingsHost[];
 extern const char kChromeUISyncResourcesHost[];
 extern const char kChromeUIThemePath[];
 extern const char kChromeUIThumbnailPath[];
+extern const char kChromeUIMenu[];
 
 #if defined(OS_CHROMEOS)
 extern const char kChromeUIFileBrowseHost[];