GetDesktop implementation for Automation API.

This completes the initial implementation of the desktop portion of the automation API. It hooks up the javascript side bindings and js side backing objects.


BUG=309681
NOTRY=true

Review URL: https://codereview.chromium.org/260593002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@269036 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/extensions/browser/extension_function_histogram_value.h b/extensions/browser/extension_function_histogram_value.h
index 3a08a473..b4680c8 100644
--- a/extensions/browser/extension_function_histogram_value.h
+++ b/extensions/browser/extension_function_histogram_value.h
@@ -815,6 +815,7 @@
   WEBVIEW_SHOWCONTEXTMENU,
   WEBRTCLOGGINGPRIVATE_STARTRTPDUMP,
   WEBRTCLOGGINGPRIVATE_STOPRTPDUMP,
+  AUTOMATIONINTERNAL_ENABLEDESKTOP,
   // Last entry: Add new entries above and ensure to update
   // tools/metrics/histograms/histograms/histograms.xml.
   ENUM_BOUNDARY