Correctly sets the security origin for the IME window.

chrome/browser/ui/ime/ime_window.cc

Index: chrome/browser/ui/ime/ime_window.cc
diff --git a/chrome/browser/ui/ime/ime_window.cc b/chrome/browser/ui/ime/ime_window.cc
index a8d1a75107c2c3e412fe51ccc6006f5cf9979d57..64dcb96782271950f2f52f5a30da6d6c32d1d8b4 100644
--- a/chrome/browser/ui/ime/ime_window.cc
+++ b/chrome/browser/ui/ime/ime_window.cc
@@ -10,6 +10,7 @@
 #include "chrome/browser/ui/ime/ime_window_observer.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/render_frame_host.h"
+#include "content/public/browser/render_process_host.h"
 #include "content/public/browser/web_contents.h"
 #include "extensions/common/constants.h"
 #include "extensions/common/extension.h"
@@ -28,6 +29,7 @@ namespace ui {
 
 ImeWindow::ImeWindow(Profile* profile,
                      const extensions::Extension* extension,
+                     content::RenderFrameHost* render_frame_host,
                      const std::string& url,
                      Mode mode,
                      const gfx::Rect& bounds)
@@ -46,9 +48,11 @@ ImeWindow::ImeWindow(Profile* profile,
   if (!gurl.is_valid())
     gurl = extension->GetResourceURL(url);
 
-  content::SiteInstance* instance =
-      content::SiteInstance::CreateForURL(profile, gurl);
-  content::WebContents::CreateParams create_params(profile, instance);
+  content::WebContents::CreateParams create_params(
+      profile, render_frame_host->GetSiteInstance());
+  create_params.opener_render_process_id =
+      render_frame_host->GetProcess()->GetID();
+  create_params.opener_render_frame_id = render_frame_host->GetRoutingID();
   web_contents_.reset(content::WebContents::Create(create_params));
   web_contents_->SetDelegate(this);
   content::OpenURLParams params(gurl, content::Referrer(), SINGLETON_TAB,