Factor out uses of the WebContentsModalDialog interface from platform-independent code

chrome/browser/ui/cocoa/constrained_web_dialog_delegate_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/webui/constrained_web_dialog_delegate_base.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/memory/scoped_nsobject.h"
 #import "chrome/browser/ui/cocoa/constrained_window/constrained_window_custom_sheet.h"
 #import "chrome/browser/ui/cocoa/constrained_window/constrained_window_custom_window.h"
 #import "chrome/browser/ui/cocoa/constrained_window/constrained_window_mac.h"
 #include "content/public/browser/web_contents.h"
 #include "ui/gfx/size.h"
 #include "ui/web_dialogs/web_dialog_delegate.h"
 #include "ui/web_dialogs/web_dialog_ui.h"
 #include "ui/web_dialogs/web_dialog_web_contents_delegate.h"
 
 using content::WebContents;
 using ui::WebDialogDelegate;
 using ui::WebDialogWebContentsDelegate;
 
-class ConstrainedWebDialogDelegateMac :
+namespace {
+
+class ConstrainedWebDialogDelegateMac
+    : public ConstrainedWebDialogDelegateBase {
+ public:
+  ConstrainedWebDialogDelegateMac(
+      content::BrowserContext* browser_context,
+      WebDialogDelegate* delegate,
+      WebDialogWebContentsDelegate* tab_delegate)
+      : ConstrainedWebDialogDelegateBase(
+            browser_context, delegate, tab_delegate) {}
+
+  // WebDialogWebContentsDelegate interface.
+  virtual void CloseContents(WebContents* source) OVERRIDE {
+    window_->CloseWebContentsModalDialog();
+  }
+
+  void set_window(ConstrainedWindowMac* window) { window_ = window; }
+  ConstrainedWindowMac* window() const { return window_; }
+
+ private:
+  // Weak, owned by ConstrainedWebDialogDelegateViewMac.
+  ConstrainedWindowMac* window_;
+
+  DISALLOW_COPY_AND_ASSIGN(ConstrainedWebDialogDelegateMac);
+};
+
+}  // namespace
+
+class ConstrainedWebDialogDelegateViewMac :
     public ConstrainedWindowMacDelegate,
     public ConstrainedWebDialogDelegate {
 
  public:
-  ConstrainedWebDialogDelegateMac(
+  ConstrainedWebDialogDelegateViewMac(
       content::BrowserContext* browser_context,
       WebDialogDelegate* delegate,
       WebDialogWebContentsDelegate* tab_delegate,
       content::WebContents* web_contents);
-  virtual ~ConstrainedWebDialogDelegateMac() {}
+  virtual ~ConstrainedWebDialogDelegateViewMac() {}
 
   // ConstrainedWebDialogDelegate interface
   virtual const WebDialogDelegate*
       GetWebDialogDelegate() const OVERRIDE {
     return impl_->GetWebDialogDelegate();
   }
   virtual WebDialogDelegate* GetWebDialogDelegate() OVERRIDE {
     return impl_->GetWebDialogDelegate();
   }
   virtual void OnDialogCloseFromWebUI() OVERRIDE {
     return impl_->OnDialogCloseFromWebUI();
   }
   virtual void ReleaseWebContentsOnDialogClose() OVERRIDE {
     return impl_->ReleaseWebContentsOnDialogClose();
   }
-  virtual WebContentsModalDialog* GetWindow() OVERRIDE {
-    return impl_->GetWindow();
+  virtual NativeWebContentsModalDialog GetNativeDialog() OVERRIDE {
+    return constrained_window_->GetNativeDialog();
   }
   virtual WebContents* GetWebContents() OVERRIDE {
     return impl_->GetWebContents();
   }
 
   // ConstrainedWindowMacDelegate interface
   virtual void OnConstrainedWindowClosed(
       ConstrainedWindowMac* window) OVERRIDE {
     if (!impl_->closed_via_webui())
       GetWebDialogDelegate()->OnDialogClosed("");
     delete this;
   }
 
  private:
-  scoped_ptr<ConstrainedWebDialogDelegateBase> impl_;
+  scoped_ptr<ConstrainedWebDialogDelegateMac> impl_;
   scoped_ptr<ConstrainedWindowMac> constrained_window_;
   scoped_nsobject<NSWindow> window_;
 
-  DISALLOW_COPY_AND_ASSIGN(ConstrainedWebDialogDelegateMac);
+  DISALLOW_COPY_AND_ASSIGN(ConstrainedWebDialogDelegateViewMac);
 };
 
-ConstrainedWebDialogDelegateMac::ConstrainedWebDialogDelegateMac(
+ConstrainedWebDialogDelegateViewMac::ConstrainedWebDialogDelegateViewMac(
     content::BrowserContext* browser_context,
     WebDialogDelegate* delegate,
     WebDialogWebContentsDelegate* tab_delegate,
     content::WebContents* web_contents)
-    : impl_(new ConstrainedWebDialogDelegateBase(browser_context,
-                                                 delegate,
-                                                 tab_delegate)) {
+    : impl_(new ConstrainedWebDialogDelegateMac(browser_context,
+                                                delegate,
+                                                tab_delegate)) {
   // Create a window to hold web_contents in the constrained sheet:
   gfx::Size size;
   delegate->GetDialogSize(&size);
   NSRect frame = NSMakeRect(0, 0, size.width(), size.height());
 
   window_.reset(
       [[ConstrainedWindowCustomWindow alloc] initWithContentRect:frame]);
   [GetWebContents()->GetNativeView() setFrame:frame];
   [[window_ contentView] addSubview:GetWebContents()->GetNativeView()];
 
   scoped_nsobject<CustomConstrainedWindowSheet> sheet(
       [[CustomConstrainedWindowSheet alloc]
           initWithCustomWindow:window_]);
   constrained_window_.reset(new ConstrainedWindowMac(
       this, web_contents, sheet));
-  return impl_->set_window(constrained_window_.get());
+
+  impl_->set_window(constrained_window_.get());
 }
 
 ConstrainedWebDialogDelegate* CreateConstrainedWebDialog(
         content::BrowserContext* browser_context,
         WebDialogDelegate* delegate,
         WebDialogWebContentsDelegate* tab_delegate,
         content::WebContents* web_contents) {
   // Deleted when the dialog closes.
-  ConstrainedWebDialogDelegateMac* constrained_delegate =
-      new ConstrainedWebDialogDelegateMac(
+  ConstrainedWebDialogDelegateViewMac* constrained_delegate =
+      new ConstrainedWebDialogDelegateViewMac(
           browser_context, delegate, tab_delegate, web_contents);
   return constrained_delegate;
 }