<webview>: Change how plugin load works inside guests.

chrome/browser/guestview/webview/webview_guest.cc

Index: chrome/browser/guestview/webview/webview_guest.cc
diff --git a/chrome/browser/guestview/webview/webview_guest.cc b/chrome/browser/guestview/webview/webview_guest.cc
index 2c8e825a915ed4c79c1fc845200f4d8d121818c1..e6d8bf3874e3a6efe984a44d8b36b041eb429b67 100644
--- a/chrome/browser/guestview/webview/webview_guest.cc
+++ b/chrome/browser/guestview/webview/webview_guest.cc
@@ -11,6 +11,7 @@
 #include "chrome/browser/favicon/favicon_tab_helper.h"
 #include "chrome/browser/guestview/guestview_constants.h"
 #include "chrome/browser/guestview/webview/webview_constants.h"
+#include "chrome/browser/guestview/webview/webview_permission_types.h"
 #include "chrome/common/chrome_version_info.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/native_web_keyboard_event.h"
@@ -26,6 +27,10 @@
 #include "content/public/common/result_codes.h"
 #include "net/base/net_errors.h"
 
+#if defined(ENABLE_PLUGINS)
+#include "chrome/browser/guestview/webview/plugin_permission_helper.h"
+#endif
+
 using content::WebContents;
 
 namespace {
@@ -62,6 +67,8 @@ static std::string PermissionTypeToString(BrowserPluginPermissionType type) {
       return webview::kPermissionTypePointerLock;
     case BROWSER_PLUGIN_PERMISSION_TYPE_JAVASCRIPT_DIALOG:
       return webview::kPermissionTypeDialog;
+    case WEB_VIEW_PERMISSION_TYPE_LOAD_PLUGIN:
+      return webview::kPermissionTypeLoadPlugin;
     case BROWSER_PLUGIN_PERMISSION_TYPE_UNKNOWN:
     default:
       NOTREACHED();
@@ -85,6 +92,9 @@ void RemoveWebViewEventListenersOnIOThread(
 
 void AttachWebViewHelpers(WebContents* contents) {
   FaviconTabHelper::CreateForWebContents(contents);
+#if defined(ENABLE_PLUGINS)
+  PluginPermissionHelper::CreateForWebContents(contents);
+#endif
 }
 
 }  // namespace
@@ -116,6 +126,12 @@ WebViewGuest* WebViewGuest::From(int embedder_process_id,
   return guest->AsWebView();
 }
 
+// static
+WebViewGuest* WebViewGuest::FromWebContents(WebContents* contents) {
+  GuestView* guest = GuestView::FromWebContents(contents);
+  return guest ? guest->AsWebView() : NULL;
+}
+
 void WebViewGuest::Attach(WebContents* embedder_web_contents,
                           const std::string& extension_id,
                           const base::DictionaryValue& args) {