Fix range comparison. Get space to accept keyword work.

chrome/browser/autocomplete/autocomplete_edit_view_views.cc

 // Copyright (c) 2011 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_view_views.h"
 
 #include "app/l10n_util.h"
 #include "base/logging.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
@@ skipping 466 matching lines @@
   }
   views::TextRange new_sel;
   textfield_->GetSelectedRange(&new_sel);
 
   size_t length = GetTextLength();
   bool at_end_of_edit = (new_sel.start() == length && new_sel.end() == length);
 
   // See if the text or selection have changed since OnBeforePossibleChange().
   std::wstring new_text = GetText();
   text_changed_ = (new_text != text_before_change_);
-  bool selection_differs = !sel_before_change_.Equals(new_sel);
+  bool selection_differs =
+      !((sel_before_change_.is_empty() && new_sel.is_empty()) ||
+        sel_before_change_.EqualsIgnoringDirection(new_sel));
 
   // When the user has deleted text, we don't allow inline autocomplete.  Make
   // sure to not flag cases like selecting part of the text and then pasting
   // (or typing) the prefix of that selection.  (We detect these by making
   // sure the caret, which should be after any insertion, hasn't moved
   // forward of the old selection start.)
   bool just_deleted_text =
       (text_before_change_.length() > new_text.length()) &&
       (new_sel.start() <= sel_before_change_.GetMin());
 
@@ skipping 128 matching lines @@
 
 string16 AutocompleteEditViewViews::GetSelectedText() const {
   // TODO(oshima): Support instant, IME.
   return textfield_->GetSelectedText();
 }
 
 void AutocompleteEditViewViews::SelectRange(size_t caret, size_t end) {
   const views::TextRange range(caret, end);
   textfield_->SelectRange(range);
 }