[Mac] Don't handle up/down-arrow unless popup is visible.

chrome/browser/autocomplete/autocomplete_edit_view_mac.mm

 // Copyright (c) 2009 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_mac.h"
 
 #include "base/clipboard.h"
 #include "base/string_util.h"
 #include "base/sys_string_conversions.h"
 #include "chrome/browser/autocomplete/autocomplete_edit.h"
@@ skipping 561 matching lines @@
   // OnAfterPossibleChange(), even if identical contents are pasted into the
   // text box.
   text_before_change_.clear();
 
   NSString* s = base::SysWideToNSString(text);
   [[field_ currentEditor] replaceCharactersInRange:selectedRange withString:s];
 
   OnAfterPossibleChange();
 }
 
+bool AutocompleteEditViewMac::IsPopupOpen() const {
+  return popup_view_->IsOpen();
+}
+
 void AutocompleteEditViewMac::OnControlKeyChanged(bool pressed) {
   model_->OnControlKeyChanged(pressed);
 }
 
 void AutocompleteEditViewMac::AcceptInput(
     WindowOpenDisposition disposition, bool for_drop) {
   model_->AcceptInput(disposition, for_drop);
 }
 
 void AutocompleteEditViewMac::FocusLocation() {
@@ skipping 46 matching lines @@
 - initWithEditView:(AutocompleteEditViewMac*)view {
   self = [super init];
   if (self) {
     edit_view_ = view;
   }
   return self;
 }
 
 - (BOOL)control:(NSControl*)control
        textView:(NSTextView*)textView doCommandBySelector:(SEL)cmd {
-  if (cmd == @selector(moveDown:)) {
-    edit_view_->OnUpOrDownKeyPressed(false, false);
-    return YES;
-  }
-  
-  if (cmd == @selector(moveUp:)) {
-    edit_view_->OnUpOrDownKeyPressed(true, false);
-    return YES;
+  // Don't intercept up/down-arrow if the popup isn't open.
+  if (edit_view_->IsPopupOpen()) {
+    if (cmd == @selector(moveDown:)) {
+      edit_view_->OnUpOrDownKeyPressed(false, false);
+      return YES;
+    }
+
+    if (cmd == @selector(moveUp:)) {
+      edit_view_->OnUpOrDownKeyPressed(true, false);
+      return YES;
+    }
   }
   
   if (cmd == @selector(scrollPageDown:)) {
     edit_view_->OnUpOrDownKeyPressed(false, true);
     return YES;
   }
   
   if (cmd == @selector(scrollPageUp:)) {
     edit_view_->OnUpOrDownKeyPressed(true, true);
     return YES;
@@ skipping 68 matching lines @@
 // prepended and ".com" appended.  This calls down to
 // AutocompleteEditModel::OnControlKeyChanged() so that it can change
 // the popup to reflect this.  See autocomplete_edit.cc
 // OnControlKeyChanged() and OnAfterPossibleChange().
 - (void)control:(NSControl*)control flagsChanged:(NSEvent*)theEvent {
   BOOL controlFlag = ([theEvent modifierFlags]&NSControlKeyMask) != 0;
   edit_view_->OnControlKeyChanged(controlFlag);
 }
 
 @end