Print preview: Display a dummy page when a user visits chrome://print directly.

chrome/browser/ui/webui/print_preview_data_source.cc

Index: chrome/browser/ui/webui/print_preview_data_source.cc
===================================================================
--- chrome/browser/ui/webui/print_preview_data_source.cc	(revision 113720)
+++ chrome/browser/ui/webui/print_preview_data_source.cc	(working copy)
@@ -36,9 +36,17 @@
 
 };  // namespace
 
-PrintPreviewDataSource::PrintPreviewDataSource()
+PrintPreviewDataSource::PrintPreviewDataSource(bool is_dummy)
     : ChromeWebUIDataSource(chrome::kChromeUIPrintHost) {
+  Init(is_dummy);
+}
 
+void PrintPreviewDataSource::Init(bool is_dummy) {
+  if (is_dummy) {
+    AddLocalizedString("intentionallyBlankText",
+                       IDS_PRINT_PREVIEW_INTENTIONALLY_BLANK);
+  }
+
   AddLocalizedString("title", IDS_PRINT_PREVIEW_TITLE);
   AddLocalizedString("loading", IDS_PRINT_PREVIEW_LOADING);
 #if defined(GOOGLE_CHROME_BUILD)
@@ -132,7 +140,8 @@
 
   set_json_path("strings.js");
   add_resource_path("print_preview.js", IDR_PRINT_PREVIEW_JS);
-  set_default_resource(IDR_PRINT_PREVIEW_HTML);
+  set_default_resource(
+      is_dummy ? IDR_PRINT_PREVIEW_HTML_DUMMY : IDR_PRINT_PREVIEW_HTML);
 }
 
 PrintPreviewDataSource::~PrintPreviewDataSource() {
@@ -153,8 +162,8 @@
   base::SplitString(path, '/', &url_substr);
   int page_index = 0;
   if (url_substr.size() == 3 && base::StringToInt(url_substr[1], &page_index)) {
-      PrintPreviewDataService::GetInstance()->GetDataEntry(
-          url_substr[0], page_index, &data);
+    PrintPreviewDataService::GetInstance()->GetDataEntry(
+        url_substr[0], page_index, &data);
   }
   if (data.get()) {
     SendResponse(request_id, data);