Fix a memory leak in the IME candidate window of Chrome OS (2nd try).

chrome/browser/chromeos/input_method/candidate_window.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/chromeos/input_method/candidate_window.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/message_loop.h"
 #include "base/observer_list.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/chromeos/input_method/ibus_ui_controller.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/font.h"
 #include "ui/gfx/screen.h"
 #include "views/controls/label.h"
 #include "views/controls/textfield/textfield.h"
@@ skipping 1018 matching lines @@
   }
 
   // Update the previous column widths.
   previous_shortcut_column_width_ = shortcut_column_width;
   previous_candidate_column_width_ = candidate_column_width;
   previous_annotation_column_width_ = annotation_column_width;
 
   // Clear the existing candidate_views if any.
   for (size_t i = 0; i < candidate_views_.size(); ++i) {
     candidate_area_contents->RemoveChildView(candidate_views_[i]);
+    // Delete the view after getting out the current message loop iteration.
+    MessageLoop::current()->DeleteSoon(FROM_HERE, candidate_views_[i]);
   }
   candidate_views_.clear();
 
   views::GridLayout* layout = new views::GridLayout(candidate_area_contents);
   // |candidate_area_contents| owns |layout|.
   candidate_area_contents->SetLayoutManager(layout);
   // Initialize the column set.
   views::ColumnSet* column_set = layout->AddColumnSet(0);
   if (orientation == InputMethodLookupTable::kVertical) {
     column_set->AddColumn(views::GridLayout::FILL,
@@ skipping 285 matching lines @@
 CandidateWindowController::~CandidateWindowController() {
   delete impl_;
 }
 
 bool CandidateWindowController::Init() {
   return impl_->Init();
 }
 
 }  // namespace input_method
 }  // namespace chromeos