Clear Search results in the Mac app launcher on close, rather than launch.

ui/app_list/cocoa/app_list_view_controller.mm

 // Copyright 2013 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.
 
 #import "ui/app_list/cocoa/app_list_view_controller.h"
 
 #include "base/mac/foundation_util.h"
 #include "base/strings/string_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "skia/ext/skia_utils_mac.h"
@@ skipping 116 matching lines @@
 
 - (void)dealloc {
   // Ensure that setDelegate(NULL) has been called before destruction, because
   // dealloc can be called at odd times, and Objective C destruction order does
   // not properly tear down these dependencies.
   DCHECK(delegate_ == NULL);
   [appsGridController_ setPaginationObserver:nil];
   [super dealloc];
 }
 
+- (AppsSearchBoxController*)searchBoxController {
+  return appsSearchBoxController_;
+}
+
+- (BOOL)showingSearchResults {
+  return showingSearchResults_;
+}
+
 - (AppsGridController*)appsGridController {
   return appsGridController_;
 }
 
 - (NSSegmentedControl*)pagerControl {
   return pagerControl_;
 }
 
 - (NSView*)backgroundView {
   return backgroundView_;
@@ skipping 161 matching lines @@
     delegate_->StopSearch();
 }
 
 - (app_list::AppListModel*)appListModel {
   return [appsGridController_ model];
 }
 
 - (void)openResult:(app_list::SearchResult*)result {
   if (delegate_)
     delegate_->OpenSearchResult(result, 0 /* event flags */);
-
-  [appsSearchBoxController_ clearSearch];
 }
 
 - (void)redoSearch {
   [self modelTextDidChange];
 }
 
 - (void)onSigninStatusChanged {
   [appsSearchBoxController_ rebuildMenu];
   app_list::SigninDelegate* signinDelegate =
       delegate_ ? delegate_->GetSigninDelegate() : NULL;
@@ skipping 10 matching lines @@
 
   [backgroundView_ setHidden:YES];
   signinViewController_.reset(
       [[SigninViewController alloc] initWithFrame:[backgroundView_ frame]
                                      cornerRadius:kBubbleCornerRadius
                                          delegate:signinDelegate]);
   [[self view] addSubview:[signinViewController_ view]];
 }
 
 @end