DevTools: Support inplace formatting for snippets.

R=pfeldman@chromium.org, pfeldman
BUG=347496

Review URL: https://codereview.chromium.org/176843007

git-svn-id: svn://svn.chromium.org/blink/trunk@168311 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/devtools/front_end/InplaceFormatterEditorAction.js

@@ -66,7 +66,10 @@ WebInspector.InplaceFormatterEditorAction.prototype = {
      */
     _isFormattable: function(uiSourceCode)
     {
-        return !!uiSourceCode && uiSourceCode.contentType() === WebInspector.resourceTypes.Stylesheet;
+        if (!uiSourceCode)
+            return false;
+        return uiSourceCode.contentType() === WebInspector.resourceTypes.Stylesheet
+            || uiSourceCode.project().type() === WebInspector.projectTypes.Snippets;
     },
 
     _formatSourceInPlace: function()