Remove the unused parts of PPB_PDF

chrome/browser/ui/cocoa/pdf_password_dialog_cocoa.mm

-// 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.
-
-#import <Cocoa/Cocoa.h>
-
-#include "base/mac/scoped_nsobject.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/strings/sys_string_conversions.h"
-#include "base/strings/utf_string_conversions.h"
-#import "chrome/browser/ui/cocoa/constrained_window/constrained_window_alert.h"
-#import "chrome/browser/ui/cocoa/constrained_window/constrained_window_custom_sheet.h"
-#import "chrome/browser/ui/cocoa/constrained_window/constrained_window_mac.h"
-#import "chrome/browser/ui/cocoa/key_equivalent_constants.h"
-#include "chrome/grit/generated_resources.h"
-#include "components/pdf/browser/pdf_web_contents_helper_client.h"
-#include "ui/base/l10n/l10n_util.h"
-
-@class PDFPasswordDialogMac;
-
-namespace {
-
-class PDFPasswordDialogMacBridge : public ConstrainedWindowMacDelegate {
- public:
-  explicit PDFPasswordDialogMacBridge(PDFPasswordDialogMac* dialog);
-  virtual ~PDFPasswordDialogMacBridge();
-  void OnConstrainedWindowClosed(ConstrainedWindowMac* window) override;
-
- private:
-  PDFPasswordDialogMac* dialog_;  // weak
-
-  DISALLOW_COPY_AND_ASSIGN(PDFPasswordDialogMacBridge);
-};
-
-}  // namespace
-
-@interface PDFPasswordDialogMac : NSObject {
- @private
-  content::WebContents* webContents_;
-  base::string16 prompt_;
-  pdf::PasswordDialogClosedCallback callback_;
-
-  base::scoped_nsobject<NSSecureTextField> passwordField_;
-
-  base::scoped_nsobject<ConstrainedWindowAlert> alert_;
-  scoped_ptr<PDFPasswordDialogMacBridge> bridge_;
-  scoped_ptr<ConstrainedWindowMac> window_;
-}
-- (id)initWithWebContents:(content::WebContents*)webContents
-                   prompt:(base::string16)prompt
-                 callback:(pdf::PasswordDialogClosedCallback)callback;
-- (void)onOKButton:(id)sender;
-- (void)onCancelButton:(id)sender;
-@end
-
-namespace {
-
-PDFPasswordDialogMacBridge::PDFPasswordDialogMacBridge(
-    PDFPasswordDialogMac* dialog) : dialog_(dialog) {
-}
-
-PDFPasswordDialogMacBridge::~PDFPasswordDialogMacBridge() {
-}
-
-void PDFPasswordDialogMacBridge::OnConstrainedWindowClosed(
-    ConstrainedWindowMac* window) {
-  [dialog_ release];
-}
-
-}  // namespace
-
-@implementation PDFPasswordDialogMac
-
-- (id)initWithWebContents:(content::WebContents*)webContents
-                   prompt:(base::string16)prompt
-                 callback:(pdf::PasswordDialogClosedCallback)callback {
-  if ((self = [super init])) {
-    webContents_ = webContents;
-    prompt_ = prompt;
-    callback_ = callback;
-
-    alert_.reset([[ConstrainedWindowAlert alloc] init]);
-    [alert_ setMessageText:
-        l10n_util::GetNSString(IDS_PDF_PASSWORD_DIALOG_TITLE)];
-    [alert_ setInformativeText:base::SysUTF16ToNSString(prompt)];
-    [alert_ addButtonWithTitle:l10n_util::GetNSString(IDS_OK)
-                 keyEquivalent:kKeyEquivalentReturn
-                        target:self
-                        action:@selector(onOKButton:)];
-    [alert_ addButtonWithTitle:l10n_util::GetNSString(IDS_CANCEL)
-                 keyEquivalent:kKeyEquivalentEscape
-                        target:self
-                        action:@selector(onCancelButton:)];
-    [[alert_ closeButton] setTarget:self];
-    [[alert_ closeButton] setAction:@selector(onCancelButton:)];
-
-    passwordField_.reset(
-        [[NSSecureTextField alloc] initWithFrame:NSMakeRect(0, 0, 300, 22)]);
-    [alert_ setAccessoryView:passwordField_];
-
-    [alert_ layout];
-
-    base::scoped_nsobject<CustomConstrainedWindowSheet> sheet(
-        [[CustomConstrainedWindowSheet alloc]
-            initWithCustomWindow:[alert_ window]]);
-    bridge_.reset(new PDFPasswordDialogMacBridge(self));
-    window_.reset(new ConstrainedWindowMac(bridge_.get(), webContents_, sheet));
-  }
-  return self;
-}
-
-- (void)dealloc {
-  if (!callback_.is_null()) {
-    // This dialog was torn down without either OK or cancel being clicked; be
-    // considerate and at least do the callback.
-    callback_.Run(false, base::string16());
-  }
-  [super dealloc];
-}
-
-- (void)onOKButton:(id)sender {
-  callback_.Run(true, base::SysNSStringToUTF16([passwordField_ stringValue]));
-  callback_.Reset();
-  window_->CloseWebContentsModalDialog();
-}
-
-- (void)onCancelButton:(id)sender {
-  callback_.Run(false, base::string16());
-  callback_.Reset();
-  window_->CloseWebContentsModalDialog();
-}
-
-@end
-
-void ShowPDFPasswordDialog(content::WebContents* web_contents,
-                           const base::string16& prompt,
-                           const pdf::PasswordDialogClosedCallback& callback) {
-  [[PDFPasswordDialogMac alloc] initWithWebContents:web_contents
-                                             prompt:prompt
-                                           callback:callback];
-}