Added functionality to use "SaveAs..." from PDF plugin.

chrome/browser/ui/download/download_tab_helper.cc

 // Copyright (c) 2011 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/download/download_tab_helper.h"
 
 #include "chrome/browser/download/download_manager.h"
 #include "chrome/browser/download/download_util.h"
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/common/render_messages.h"
 #include "content/browser/tab_contents/tab_contents.h"
+#include "content/common/view_messages.h"
 
 DownloadTabHelper::DownloadTabHelper(TabContents* tab_contents)
-    : tab_contents_(tab_contents) {
-  DCHECK(tab_contents_);
+    : TabContentsObserver(tab_contents) {
+  DCHECK(tab_contents);
 }
 
 DownloadTabHelper::~DownloadTabHelper() {
 }
 
 void DownloadTabHelper::OnSavePage() {
   // If we can not save the page, try to download it.
-  if (!SavePackage::IsSavableContents(tab_contents_->contents_mime_type())) {
-    DownloadManager* dlm = tab_contents_->profile()->GetDownloadManager();
-    const GURL& current_page_url = tab_contents_->GetURL();
+  if (!SavePackage::IsSavableContents(tab_contents()->contents_mime_type())) {
+    DownloadManager* dlm = tab_contents()->profile()->GetDownloadManager();
+    const GURL& current_page_url = tab_contents()->GetURL();
     if (dlm && current_page_url.is_valid()) {
-      dlm->DownloadUrl(current_page_url, GURL(), "", tab_contents_);
+      dlm->DownloadUrl(current_page_url, GURL(), "", tab_contents());
       download_util::RecordDownloadCount(
           download_util::INITIATED_BY_SAVE_PACKAGE_FAILURE_COUNT);
     }
     return;
   }
 
-  tab_contents_->Stop();
+  tab_contents()->Stop();
 
   // Create the save package and possibly prompt the user for the name to save
   // the page as. The user prompt is an asynchronous operation that runs on
   // another thread.
-  save_package_ = new SavePackage(tab_contents_);
+  save_package_ = new SavePackage(tab_contents());
   save_package_->GetSaveInfo();
 }
 
 // Used in automated testing to bypass prompting the user for file names.
 // Instead, the names and paths are hard coded rather than running them through
 // file name sanitation and extension / mime checking.
 bool DownloadTabHelper::SavePage(const FilePath& main_file,
                                  const FilePath& dir_path,
                                  SavePackage::SavePackageType save_type) {
   // Stop the page from navigating.
-  tab_contents_->Stop();
+  tab_contents()->Stop();
 
   save_package_ =
-      new SavePackage(tab_contents_, save_type, main_file, dir_path);
+      new SavePackage(tab_contents(), save_type, main_file, dir_path);
   return save_package_->Init();
 }
+
+bool DownloadTabHelper::OnMessageReceived(const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(DownloadTabHelper, message)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_SaveAs, OnSavePage)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+
+  return handled;
+}
+