Add a "Simplify Page" option to the print preview dialog

chrome/browser/printing/print_preview_dialog_controller.cc

 // 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/printing/print_preview_dialog_controller.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 164 matching lines @@
   if (!preview_dialog)
     return CreatePrintPreviewDialog(initiator);
 
   // Show the initiator holding the existing preview dialog.
   initiator->GetDelegate()->ActivateContents(initiator);
   return preview_dialog;
 }
 
 WebContents* PrintPreviewDialogController::GetPrintPreviewForContents(
     WebContents* contents) const {
+
+  // If this WebContents relies on another for its preview dialog, we
+  // need to act as if we are looking for the proxied content's dialog.
+  PrintPreviewDialogMap::const_iterator proxied =
+        proxied_dialog_map_.find(contents);
+  if (proxied != proxied_dialog_map_.end()) {
+    contents = const_cast<WebContents*>(proxied->second);
+  }
+
   // |preview_dialog_map_| is keyed by the preview dialog, so if find()
   // succeeds, then |contents| is the preview dialog.
   PrintPreviewDialogMap::const_iterator it = preview_dialog_map_.find(contents);
   if (it != preview_dialog_map_.end())
     return contents;
 
   for (it = preview_dialog_map_.begin();
        it != preview_dialog_map_.end();
        ++it) {
     // If |contents| is an initiator.
@@ skipping 172 matching lines @@
   // Add an entry to the map.
   preview_dialog_map_[preview_dialog] = initiator;
   waiting_for_new_preview_page_ = true;
 
   AddObservers(initiator);
   AddObservers(preview_dialog);
 
   return preview_dialog;
 }
 
+void PrintPreviewDialogController::AddProxyDialogForWebContents(
+    WebContents* source, WebContents* target) {
+  proxied_dialog_map_[source] = target;
+}
+
+void PrintPreviewDialogController::RemoveProxyDialogForWebContents(
+    WebContents* source) {
+  proxied_dialog_map_.erase(source);
+}
+
 void PrintPreviewDialogController::SaveInitiatorTitle(
     WebContents* preview_dialog) {
   WebContents* initiator = GetInitiator(preview_dialog);
   if (initiator && preview_dialog->GetWebUI()) {
     PrintPreviewUI* print_preview_ui = static_cast<PrintPreviewUI*>(
         preview_dialog->GetWebUI()->GetController());
     print_preview_ui->SetInitiatorTitle(
         PrintViewManager::FromWebContents(initiator)->RenderSourceName());
   }
 }
@@ skipping 69 matching lines @@
         static_cast<PrintPreviewUI*>(web_ui->GetController());
     if (print_preview_ui)
       print_preview_ui->OnPrintPreviewDialogDestroyed();
   }
 
   preview_dialog_map_.erase(preview_dialog);
   RemoveObservers(preview_dialog);
 }
 
 }  // namespace printing