Pepper: specify the security origin when enumerating media devices.

content/renderer/pepper/pepper_file_system_host.cc

Index: content/renderer/pepper/pepper_file_system_host.cc
diff --git a/content/renderer/pepper/pepper_file_system_host.cc b/content/renderer/pepper/pepper_file_system_host.cc
index 1944ee3662c747f28e3ce70a306ae10b5e2b1a5c..17869d4a193ea9b698ccc9ed2d53d04ab0f76cda 100644
--- a/content/renderer/pepper/pepper_file_system_host.cc
+++ b/content/renderer/pepper/pepper_file_system_host.cc
@@ -17,9 +17,7 @@
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/shared_impl/file_type_conversion.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
-#include "third_party/WebKit/public/web/WebElement.h"
 #include "third_party/WebKit/public/web/WebFrame.h"
-#include "third_party/WebKit/public/web/WebPluginContainer.h"
 #include "third_party/WebKit/public/web/WebView.h"
 #include "webkit/common/fileapi/file_system_util.h"
 
@@ -131,17 +129,15 @@ int32_t PepperFileSystemHost::OnHostMsgOpen(
       return PP_ERROR_FAILED;
   }
 
-  PepperPluginInstance* plugin_instance =
-      renderer_ppapi_host_->GetPluginInstance(pp_instance());
-  if (!plugin_instance)
+  GURL document_url = renderer_ppapi_host_->GetDocumentURL(pp_instance());
+  if (!document_url.is_valid())
     return PP_ERROR_FAILED;
 
   FileSystemDispatcher* file_system_dispatcher =
       ChildThread::current()->file_system_dispatcher();
   reply_context_ = context->MakeReplyMessageContext();
   file_system_dispatcher->OpenFileSystem(
-      GURL(plugin_instance->GetContainer()->element().document().url()).
-          GetOrigin(),
+      document_url.GetOrigin(),
       file_system_type,
       base::Bind(&PepperFileSystemHost::DidOpenFileSystem,
                  weak_factory_.GetWeakPtr()),