Adds comment to AdjustTextForCopy. I saw your request for a...

chrome/browser/autocomplete/autocomplete_edit.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/autocomplete/autocomplete_edit.h"
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/string_util.h"
@@ skipping 166 matching lines @@
   if (sel_start != 0)
     return;
 
   // We can't use CurrentTextIsURL() or GetDataForURLExport() because right now
   // the user is probably holding down control to cause the copy, which will
   // screw up our calculation of the desired_tld.
   if (!GetURLForText(*text, url))
     return;  // Can't be parsed as a url, no need to adjust text.
 
   if (!user_input_in_progress() && is_all_selected) {
+    // The user selected all the text and has not edited it. Use the url as the
+    // text so that if the scheme was stripped it's added back, and the url
+    // is unescaped (we escape parts of the url for display).
     *text = UTF8ToWide(url->spec());
     *write_url = true;
     return;
   }
 
   // Prefix the text with 'http://' if the text doesn't start with 'http://',
   // the text parses as a url with a scheme of http, the user selected the
   // entire host, and the user hasn't edited the host or manually removed the
   // scheme.
   if (url->SchemeIs(chrome::kHttpScheme)) {
@@ skipping 422 matching lines @@
     AutocompleteMatch* match,
     GURL* alternate_nav_url) const {
   if (popup_->IsOpen() || query_in_progress()) {
     popup_->InfoForCurrentSelection(match, alternate_nav_url);
   } else {
     profile_->GetAutocompleteClassifier()->Classify(
         UserTextFromDisplayText(view_->GetText()), GetDesiredTLD(), match,
         alternate_nav_url);
   }
 }