Don't use process isolation for bookmark apps.

chrome/renderer/chrome_content_renderer_client.h

Index: chrome/renderer/chrome_content_renderer_client.h
diff --git a/chrome/renderer/chrome_content_renderer_client.h b/chrome/renderer/chrome_content_renderer_client.h
index 2cc976a64ec6ab74df1e09823f3cacc6450f510b..55a904ca9488ca3893a17abba4c7dea5563b996b 100644
--- a/chrome/renderer/chrome_content_renderer_client.h
+++ b/chrome/renderer/chrome_content_renderer_client.h
@@ -14,7 +14,9 @@
 #include "content/public/renderer/content_renderer_client.h"
 
 class ChromeRenderProcessObserver;
+class Extension;
 class ExtensionDispatcher;
+class ExtensionSet;
 class RendererHistogramSnapshots;
 class RendererNetPredictor;
 class RendererTracking;
@@ -126,6 +128,11 @@ class ChromeContentRendererClient : public content::ContentRendererClient {
       bool is_blocked_for_prerendering,
       bool allow_loading);
 
+  // Returns the extension for the given URL.  Excludes extension objects for
+  // bookmark apps, which do not use the app process model.
+  const Extension* GetNonBookmarkAppExtension(const ExtensionSet* extensions,
+                                              const GURL& url);
+
   // Returns true if the frame is navigating to an URL either into or out of an
   // extension app's extent.
   bool CrossesExtensionExtents(WebKit::WebFrame* frame,