Reland r167487: Get full WebPluginInfo for the PDF plug-in before enabling it for print preview.

chrome/browser/printing/print_preview_test.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_test.h"
+
+#include "chrome/browser/prefs/pref_service.h"
+#include "chrome/common/pref_names.h"
+#include "content/public/browser/plugin_service.h"
+
+PrintPreviewTest::PrintPreviewTest() {}
+PrintPreviewTest::~PrintPreviewTest() {}
+
+void PrintPreviewTest::SetUp() {
+  BrowserWithTestWindowTest::SetUp();
+
+  // The PluginService will be destroyed at the end of the test (due to the
+  // ShadowingAtExitManager in our base class).
+  content::PluginService::GetInstance()->SetPluginListForTesting(
+      &plugin_list_);
+
+  profile()->GetPrefs()->SetBoolean(prefs::kPrintPreviewDisabled, false);
+}