Initialize all OmniboxViewMac member variables

chrome/browser/ui/cocoa/omnibox/omnibox_view_mac.mm

 // Copyright (c) 2012 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/ui/cocoa/omnibox/omnibox_view_mac.h"
 
 #include <Carbon/Carbon.h>  // kVK_Return
 
 #include "base/mac/foundation_util.h"
 #include "base/strings/string_util.h"
@@ skipping 122 matching lines @@
 }
 
 OmniboxViewMac::OmniboxViewMac(OmniboxEditController* controller,
                                ToolbarModel* toolbar_model,
                                Profile* profile,
                                CommandUpdater* command_updater,
                                AutocompleteTextField* field)
     : OmniboxView(profile, controller, toolbar_model, command_updater),
       popup_view_(new OmniboxPopupViewMac(this, model(), field)),
       field_(field),
+      saved_temporary_selection_(NSMakeRange(0, 0)),
+      selection_before_change_(NSMakeRange(0, 0)),
+      marked_range_before_change_(NSMakeRange(0, 0)),
       delete_was_pressed_(false),
       delete_at_end_pressed_(false) {
   [field_ setObserver:this];
 
   // Needed so that editing doesn't lose the styling.
   [field_ setAllowsEditingTextAttributes:YES];
 
   // Get the appropriate line height for the font that we use.
   base::scoped_nsobject<NSLayoutManager> layoutManager(
       [[NSLayoutManager alloc] init]);
@@ skipping 805 matching lines @@
 
 NSUInteger OmniboxViewMac::GetTextLength() const {
   return [field_ currentEditor] ?  [[[field_ currentEditor] string] length] :
                                    [[field_ stringValue] length];
 }
 
 bool OmniboxViewMac::IsCaretAtEnd() const {
   const NSRange selection = GetSelectedRange();
   return NSMaxRange(selection) == GetTextLength();
 }