Introduce new async IPC message to get file icons

chrome/common/render_messages_internal.h

Index: chrome/common/render_messages_internal.h
===================================================================
--- chrome/common/render_messages_internal.h	(revision 46794)
+++ chrome/common/render_messages_internal.h	(working copy)
@@ -509,6 +509,11 @@
   IPC_MESSAGE_ROUTED1(ViewMsg_RunFileChooserResponse,
                       std::vector<FilePath> /* selected files */)
 
+  IPC_MESSAGE_ROUTED2(ViewMsg_ChooseIconForFilesResponse,
+                      int /* ID passed in ViewHostMsg_ChooseIconForFiles() */,
+                      /* An icon for the selected files in PNG */
+                      std::vector<unsigned char>)
+
   // Used to instruct the RenderView to go into "view source" mode.
   IPC_MESSAGE_ROUTED0(ViewMsg_EnableViewSourceMode)
 
@@ -1440,6 +1445,12 @@
   IPC_MESSAGE_ROUTED1(ViewHostMsg_RunFileChooser,
                       ViewHostMsg_RunFileChooser_Params)
 
+  // Requests to load an icon for the specified files, and return the icon
+  // in a ViewHost_ChooseIconForFilesResponse message.
+  IPC_MESSAGE_ROUTED2(ViewHostMsg_ChooseIconForFiles,
+                      int /* Request identifier */,
+                      std::vector<FilePath> /* file names */)
+
   // Notification that forms have been seen that are candidates for
   // filling/submitting by the AutoFillManager.
   IPC_MESSAGE_ROUTED1(ViewHostMsg_FormsSeen,