Introduce new async IPC message to get file icons

third_party/WebKit/WebKit/chromium/public/WebViewClient.h

Index: third_party/WebKit/WebKit/chromium/public/WebViewClient.h
===================================================================
--- third_party/WebKit/WebKit/chromium/public/WebViewClient.h	(revision 58975)
+++ third_party/WebKit/WebKit/chromium/public/WebViewClient.h	(working copy)
@@ -48,6 +48,7 @@
 class WebFileChooserCompletion;
 class WebFrame;
 class WebGeolocationService;
+class WebIconLoadingCompletion;
 class WebImage;
 class WebNode;
 class WebNotificationPresenter;
@@ -98,6 +99,9 @@
     // Called to retrieve the provider of desktop notifications.
     virtual WebNotificationPresenter* notificationPresenter() { return 0; }
 
+    // Called to request an icon for the specified filenames.
+    // The icon is shown in a file upload control.
+    virtual bool chooseIconForFiles(const WebVector<WebString>& filenames, WebIconLoadingCompletion*) { return false; }
 
     // Navigational --------------------------------------------------------