media: Invoke PlatformVerificationDialog from ProtectedMediaIdentifierPermissionContext.

chrome/browser/chromeos/attestation/platform_verification_dialog.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_ATTESTATION_PLATFORM_VERIFICATION_DIALOG_H_
 #define CHROME_BROWSER_CHROMEOS_ATTESTATION_PLATFORM_VERIFICATION_DIALOG_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/strings/string16.h"
 #include "chrome/browser/chromeos/attestation/platform_verification_flow.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "ui/views/controls/styled_label_listener.h"
 #include "ui/views/window/dialog_delegate.h"
 
 namespace content {
 class WebContents;
 }
 
 namespace chromeos {
 namespace attestation {
 
 // A tab-modal dialog UI to ask the user for PlatformVerificationFlow.
 class PlatformVerificationDialog : public views::DialogDelegateView,
                                    public views::StyledLabelListener,
                                    public content::WebContentsObserver {
  public:
   // Initializes a tab-modal dialog for |web_contents| and shows it.
-  static void ShowDialog(
+  // Returns a non-owning pointer to the widget so that caller can close the
+  // dialog and cancel the request. The returned widget is only guaranteed to be
+  // valid before |callback| is returned.

[ddorwin, 2015/02/05 02:23:23]

s/returned/called/?

[xhwang, 2015/02/05 02:49:34]

Done.

+  static views::Widget* ShowDialog(
       content::WebContents* web_contents,
+      const GURL& requesting_origin,
       const PlatformVerificationFlow::Delegate::ConsentCallback& callback);
 
  protected:
   ~PlatformVerificationDialog() override;
 
  private:
   PlatformVerificationDialog(
       content::WebContents* web_contents,
       const base::string16& domain,
       const PlatformVerificationFlow::Delegate::ConsentCallback& callback);
@@ skipping 22 matching lines @@
   base::string16 domain_;
   PlatformVerificationFlow::Delegate::ConsentCallback callback_;
 
   DISALLOW_COPY_AND_ASSIGN(PlatformVerificationDialog);
 };
 
 }  // namespace attestation
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_ATTESTATION_PLATFORM_VERIFICATION_DIALOG_H_