Remove obsolete plugin state handling code.

chrome/browser/printing/print_preview_dialog_controller_browsertest.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 <memory>
 
 #include "base/bind_helpers.h"
 #include "base/files/file_path.h"
@@ skipping 162 matching lines @@
     chrome::Print(browser());
     run_loop.Run();
   }
 
   WebContents* GetPrintPreviewDialog() {
     printing::PrintPreviewDialogController* dialog_controller =
         printing::PrintPreviewDialogController::GetInstance();
     return dialog_controller->GetPrintPreviewForContents(initiator_);
   }
 
+  void SetAlwaysOpenPdfExternallyForTests(bool always_open_pdf_externally) {
+    PluginPrefs::GetForProfile(browser()->profile())
+        ->SetAlwaysOpenPdfExternallyForTests(always_open_pdf_externally);
+  }
+
  private:
   void SetUpOnMainThread() override {
     WebContents* first_tab =
         browser()->tab_strip_model()->GetActiveWebContents();
     ASSERT_TRUE(first_tab);
 
     // Open a new tab so |cloned_tab_observer_| can see it first and attach a
     // RequestPrintPreviewObserver to it before the real
     // PrintPreviewMessageHandler gets created. Thus enabling
     // RequestPrintPreviewObserver to get messages first for the purposes of
@@ skipping 92 matching lines @@
     base::RunLoop run_loop;
     content::PluginService::GetInstance()->GetPlugins(
         base::Bind(&PluginsLoadedCallback, run_loop.QuitClosure()));
     run_loop.Run();
   }
   // Get the PDF plugin info.
   content::WebPluginInfo pdf_plugin_info;
   ASSERT_TRUE(GetPdfPluginInfo(&pdf_plugin_info));
 
   // Disable the PDF plugin.
-  {
-    base::RunLoop run_loop;
-    PluginPrefs::GetForProfile(browser()->profile())->EnablePlugin(
-        false,
-        base::FilePath::FromUTF8Unsafe(ChromeContentClient::kPDFPluginPath),
-        base::Bind(&PluginEnabledCallback, run_loop.QuitClosure()));
-    run_loop.Run();
-  }
+  SetAlwaysOpenPdfExternallyForTests(true);
 
   // Make sure it is actually disabled for webpages.
   ChromePluginServiceFilter* filter = ChromePluginServiceFilter::GetInstance();
   content::WebPluginInfo dummy_pdf_plugin_info = pdf_plugin_info;
   EXPECT_FALSE(filter->IsPluginAvailable(
       initiator()->GetRenderProcessHost()->GetID(),
       initiator()->GetMainFrame()->GetRoutingID(),
       browser()->profile()->GetResourceContext(), GURL(),
       url::Origin(GURL("http://google.com")), &dummy_pdf_plugin_info));
 
@@ skipping 84 matching lines @@
   content::BrowserAccessibilityState::GetInstance()->EnableAccessibility();
   ui_test_utils::NavigateToURL(browser(), GURL("data:text/html,HelloWorld"));
   PrintPreview();
   WebContents* preview_dialog = GetPrintPreviewDialog();
   WaitForAccessibilityTreeToContainNodeWithName(preview_dialog, "HelloWorld");
 }
 
 }  // namespace
 
 #endif  // defined(ENABLE_TASK_MANAGER)