Enable shadow DOM-based "missing plugin" placeholder.

chrome/renderer/plugins/shadow_dom_plugin_placeholder.cc

Index: chrome/renderer/plugins/shadow_dom_plugin_placeholder.cc
diff --git a/chrome/renderer/plugins/shadow_dom_plugin_placeholder.cc b/chrome/renderer/plugins/shadow_dom_plugin_placeholder.cc
new file mode 100644
index 0000000000000000000000000000000000000000..56e71ce38cb19acd25354c8a74eafcf07f383ef8
--- /dev/null
+++ b/chrome/renderer/plugins/shadow_dom_plugin_placeholder.cc
@@ -0,0 +1,49 @@
+// Copyright 2013 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/renderer/plugins/shadow_dom_plugin_placeholder.h"
+
+#include "base/command_line.h"
+#include "chrome/common/chrome_switches.h"
+#include "chrome/grit/generated_resources.h"
+#include "third_party/WebKit/public/web/WebPluginPlaceholder.h"
+#include "ui/base/l10n/l10n_util.h"
+
+bool ShadowDOMPluginPlaceholderEnabled() {
+  return CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kEnablePluginPlaceholderShadowDom);
+}
+
+namespace {

[Bernhard Bauer, 2014/10/29 09:53:05]

Can you move the anonymous namespace methods to the top of the file?

[jbroman, 2014/10/29 17:14:43]

Done.

+
+class PluginPlaceholderBase : public blink::WebPluginPlaceholder {
+ public:
+  virtual bool IsMissingPluginPlaceholder() const { return false; }
+};
+
+class MissingPluginPlaceholder : public PluginPlaceholderBase {
+ public:
+  // blink::WebPluginPlaceholder overrides
+  blink::WebString message() const override {
+    // TODO(jbroman): IDS_PLUGIN_SEARCHING if ENABLE_PLUGIN_INSTALLATION
+    return l10n_util::GetStringUTF16(IDS_PLUGIN_NOT_SUPPORTED);
+  }
+
+  // PluginPlaceholderBase overrides
+  bool IsMissingPluginPlaceholder() const override { return true; }
+};
+
+}  // namespace
+
+scoped_ptr<blink::WebPluginPlaceholder>
+CreateShadowDOMPlaceholderForMissingPlugin() {
+  return make_scoped_ptr(new MissingPluginPlaceholder);
+}
+
+bool IsShadowDOMPlaceholderForMissingPlugin(
+    blink::WebPluginPlaceholder* placeholder) {
+  return placeholder &&
+         static_cast<PluginPlaceholderBase*>(placeholder)
+             ->IsMissingPluginPlaceholder();
+}