Enable shadow DOM-based "missing plugin" placeholder.

chrome/renderer/chrome_content_renderer_client.cc

Index: chrome/renderer/chrome_content_renderer_client.cc
diff --git a/chrome/renderer/chrome_content_renderer_client.cc b/chrome/renderer/chrome_content_renderer_client.cc
index 9f99262d1107d5279a117484abf56333be0263a1..d3a592ca69531221479859b66ccf22a15cdeddf2 100644
--- a/chrome/renderer/chrome_content_renderer_client.cc
+++ b/chrome/renderer/chrome_content_renderer_client.cc
@@ -45,6 +45,7 @@
 #include "chrome/renderer/playback_extension.h"
 #include "chrome/renderer/plugins/chrome_plugin_placeholder.h"
 #include "chrome/renderer/plugins/plugin_uma.h"
+#include "chrome/renderer/plugins/shadow_dom_plugin_placeholder.h"
 #include "chrome/renderer/prefetch_helper.h"
 #include "chrome/renderer/prerender/prerender_dispatcher.h"
 #include "chrome/renderer/prerender/prerender_helper.h"
@@ -92,6 +93,7 @@
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
 #include "third_party/WebKit/public/web/WebPluginContainer.h"
 #include "third_party/WebKit/public/web/WebPluginParams.h"
+#include "third_party/WebKit/public/web/WebPluginPlaceholder.h"
 #include "third_party/WebKit/public/web/WebSecurityOrigin.h"
 #include "third_party/WebKit/public/web/WebSecurityPolicy.h"
 #include "ui/base/l10n/l10n_util.h"
@@ -547,6 +549,33 @@ const Extension* ChromeContentRendererClient::GetExtensionByOrigin(
 }
 #endif
 
+scoped_ptr<blink::WebPluginPlaceholder>
+ChromeContentRendererClient::CreatePluginPlaceholder(
+    content::RenderFrame* render_frame,
+    blink::WebLocalFrame* frame,
+    const blink::WebPluginParams& orig_params) {

[Bernhard Bauer, 2014/10/29 17:45:54]

TBH, I would even move the rest of this method into
shadow_dom_plugin_placeholder.cc as well.

[jbroman, 2014/10/29 18:14:40]

Hmm, okay. Done.

+  using Status = ChromeViewHostMsg_GetPluginInfo_Status;
+
+  if (!ShadowDOMPluginPlaceholderEnabled())
+    return nullptr;
+
+  std::string orig_mime_type = orig_params.mimeType.utf8();
+  // TODO(jbroman): Investigate whether browser plugin needs special handling.
+  ChromeViewHostMsg_GetPluginInfo_Output output;
+#if defined(ENABLE_PLUGINS)
+  render_frame->Send(
+      new ChromeViewHostMsg_GetPluginInfo(render_frame->GetRoutingID(),
+                                          GURL(orig_params.url),
+                                          frame->top()->document().url(),
+                                          orig_params.mimeType.utf8(),
+                                          &output));
+#else
+  output.status.value = Status::kNotFound;
+#endif
+
+  return CreateShadowDOMPlaceholderForPluginInfo(output, orig_params);
+}
+
 bool ChromeContentRendererClient::OverrideCreatePlugin(
     content::RenderFrame* render_frame,
     WebLocalFrame* frame,