Implementation of shared worker code path for WebView file system permission.

chrome/browser/chrome_content_browser_client.cc

Index: chrome/browser/chrome_content_browser_client.cc
diff --git a/chrome/browser/chrome_content_browser_client.cc b/chrome/browser/chrome_content_browser_client.cc
index b20deb0a966297935cc939a1e26e5ea42e3e06ee..ef7423737cf181e7884dd4a47071b5c854baa069 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -1879,10 +1879,11 @@ bool ChromeContentBrowserClient::AllowWorkerDatabase(
   return allow;
 }
 
-bool ChromeContentBrowserClient::AllowWorkerFileSystem(
+void ChromeContentBrowserClient::RequestWorkerFileSystemAccessSync(
     const GURL& url,
     content::ResourceContext* context,
-    const std::vector<std::pair<int, int> >& render_frames) {
+    const std::vector<std::pair<int, int> >& render_frames,
+    base::Callback<void(bool)> callback) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   ProfileIOData* io_data = ProfileIOData::FromResourceContext(context);
   CookieSettings* cookie_settings = io_data->GetCookieSettings();
@@ -1891,13 +1892,31 @@ bool ChromeContentBrowserClient::AllowWorkerFileSystem(
   // Record access to file system for potential display in UI.
   std::vector<std::pair<int, int> >::const_iterator i;
   for (i = render_frames.begin(); i != render_frames.end(); ++i) {
+#if defined(ENABLE_EXTENSIONS)
+    bool is_web_view_guest =
+        ExtensionRendererState::GetInstance()->IsWebViewRenderer(i->first);
+    if (is_web_view_guest) {
+      BrowserThread::PostTask(BrowserThread::UI,
+                              FROM_HERE,
+                              base::Bind(&WebViewGuest::FileSystemAccessedSync,
+                                         i->first,
+                                         i->second,
+                                         url,
+                                         !allow,
+                                         callback));
+      continue;
+    }
+#endif
+    callback.Run(allow);
     BrowserThread::PostTask(
-        BrowserThread::UI, FROM_HERE,
+        BrowserThread::UI,
+        FROM_HERE,
         base::Bind(&TabSpecificContentSettings::FileSystemAccessed,
-                   i->first, i->second, url, !allow));
+                   i->first,
+                   i->second,
+                   url,
+                   !allow));
   }
-
-  return allow;
 }
 
 bool ChromeContentBrowserClient::AllowWorkerIndexedDB(