Turned UiStrings into a singleton so that the continue window does not depend on ChromotingHost.

remoting/host/disconnect_window_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.
 
 #import <Cocoa/Cocoa.h>
 
 #import "remoting/host/disconnect_window_mac.h"
 
 #include "base/compiler_specific.h"
 #include "base/string_util.h"
 #include "base/sys_string_conversions.h"
 #include "remoting/host/disconnect_window.h"
 #include "remoting/host/ui_strings.h"
 
 @interface DisconnectWindowController()
 - (BOOL)isRToL;
 - (void)Hide;
 @end
 
 namespace remoting {
 
 class DisconnectWindowMac : public remoting::DisconnectWindow {
  public:
-  DisconnectWindowMac();
+  explicit DisconnectWindowMac(const UiStrings* ui_strings);
   virtual ~DisconnectWindowMac();
 
-  virtual bool Show(const UiStrings& ui_strings,
-                    const base::Closure& disconnect_callback,
+  virtual bool Show(const base::Closure& disconnect_callback,
                     const std::string& username) OVERRIDE;
   virtual void Hide() OVERRIDE;
 
  private:
   DisconnectWindowController* window_controller_;
 
+  // Points to the localized strings.
+  const UiStrings* ui_strings_;
+
   DISALLOW_COPY_AND_ASSIGN(DisconnectWindowMac);
 };
 
-DisconnectWindowMac::DisconnectWindowMac()
-    : window_controller_(nil) {
+DisconnectWindowMac::DisconnectWindowMac(const UiStrings* ui_strings)
+    : window_controller_(nil),
+      ui_strings_(ui_strings) {
 }
 
 DisconnectWindowMac::~DisconnectWindowMac() {
   Hide();
 }
 
-bool DisconnectWindowMac::Show(const UiStrings& ui_strings,
-                               const base::Closure& disconnect_callback,
+bool DisconnectWindowMac::Show(const base::Closure& disconnect_callback,
                                const std::string& username) {
   DCHECK(!disconnect_callback.is_null());
   DCHECK(window_controller_ == nil);
 
   window_controller_ =
-      [[DisconnectWindowController alloc] initWithUiStrings:ui_strings
+      [[DisconnectWindowController alloc] initWithUiStrings:ui_strings_
                                                    callback:disconnect_callback
                                                    username:username];
   [window_controller_ showWindow:nil];
   return true;
 }
 
 void DisconnectWindowMac::Hide() {
   // DisconnectWindowController is responsible for releasing itself in its
   // windowWillClose: method.
   [window_controller_ Hide];
   window_controller_ = nil;
 }
 
-scoped_ptr<DisconnectWindow> DisconnectWindow::Create() {
-  return scoped_ptr<DisconnectWindow>(new DisconnectWindowMac());
+scoped_ptr<DisconnectWindow> DisconnectWindow::Create(
+    const UiStrings* ui_strings) {
+  return scoped_ptr<DisconnectWindow>(new DisconnectWindowMac(ui_strings));
 }
 
 }  // namespace remoting
 
 @implementation DisconnectWindowController
-- (id)initWithUiStrings:(const remoting::UiStrings&)ui_strings
+- (id)initWithUiStrings:(const remoting::UiStrings*)ui_strings
                callback:(const base::Closure&)disconnect_callback
                username:(const std::string&)username {
   self = [super initWithWindowNibName:@"disconnect_window"];
   if (self) {
-    rtl_ = (ui_strings.direction == remoting::UiStrings::RTL);
-    disconnect_message_ = ui_strings.disconnect_message;
-    disconnect_button_text_ = ui_strings.disconnect_button_text;
+    ui_strings_ = ui_strings;
     disconnect_callback_ = disconnect_callback;
     username_ = UTF8ToUTF16(username);
   }
   return self;
 }
 
 - (void)dealloc {
   [super dealloc];
 }
 
 - (IBAction)stopSharing:(id)sender {
   if (!disconnect_callback_.is_null()) {
     disconnect_callback_.Run();
   }
 }
 
 - (BOOL)isRToL {
-  return rtl_;
+  return ui_strings_->direction == remoting::UiStrings::RTL;
 }
 
 - (void)Hide {
   disconnect_callback_.Reset();
   [self close];
 }
 
 - (void)windowDidLoad {
-  string16 text = ReplaceStringPlaceholders(disconnect_message_, username_,
-                                            NULL);
+  string16 text = ReplaceStringPlaceholders(ui_strings_->disconnect_message,
+                                            username_, NULL);
   [connectedToField_ setStringValue:base::SysUTF16ToNSString(text)];
 
   [disconnectButton_ setTitle:base::SysUTF16ToNSString(
-      disconnect_button_text_)];
+      ui_strings_->disconnect_button_text)];
 
   // Resize the window dynamically based on the content.
   CGFloat oldConnectedWidth = NSWidth([connectedToField_ bounds]);
   [connectedToField_ sizeToFit];
   NSRect connectedToFrame = [connectedToField_ frame];
   CGFloat newConnectedWidth = NSWidth(connectedToFrame);
 
   // Set a max width for the connected to text field.
   if (newConnectedWidth >
       remoting::DisconnectWindow::kMaximumConnectedNameWidthInPixels) {
@@ skipping 159 matching lines @@
   path = [NSBezierPath bezierPath];
   [path moveToPoint:top];
   [path lineToPoint:bottom];
   [light setStroke];
   [path stroke];
 
   [context setShouldAntialias:alias];
 }
 
 @end