Moving the ViewHostMsg_PDFHasUnsupportedFeature IPC message to Chrome as PDF is a chrome specific

content/common/view_messages.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // IPC messages for page rendering.
 // Multiply-included message file, hence no include guard.
 
 #include "base/process.h"
 #include "base/shared_memory.h"
 #include "content/common/common_param_traits.h"
@@ skipping 1992 matching lines @@
 // cache |data| associated with |url|.
 IPC_MESSAGE_CONTROL3(ViewHostMsg_DidGenerateCacheableMetadata,
                      GURL /* url */,
                      double /* expected_response_time */,
                      std::vector<char> /* data */)
 
 // Updates the content restrictions, i.e. to disable print/copy.
 IPC_MESSAGE_ROUTED1(ViewHostMsg_UpdateContentRestrictions,
                     int /* restrictions */)
 
-// The currently displayed PDF has an unsupported feature.
-IPC_MESSAGE_ROUTED0(ViewHostMsg_PDFHasUnsupportedFeature)
-
 // Brings up SaveAs... dialog to save specified URL.
 IPC_MESSAGE_ROUTED1(ViewHostMsg_SaveURLAs,
                     GURL /* url */)
 
 // Notifies when default plugin updates status of the missing plugin.
 IPC_MESSAGE_ROUTED1(ViewHostMsg_MissingPluginStatus,
                     int /* status */)
 
 // Displays a JavaScript out-of-memory message in the infobar.
 IPC_MESSAGE_ROUTED0(ViewHostMsg_JSOutOfMemory)
@@ skipping 49 matching lines @@
                     int32 /* complete status */)
 
 // Request updated information about the client firewall traversal policy.
 // Will result in a ViewMsg_UpdateRemoteAccessClientFirewallTraversal message
 // being sent back.
 IPC_MESSAGE_ROUTED0(ViewHostMsg_RequestRemoteAccessClientFirewallTraversal)
 
 // Notifies the browser of an event occurring in the media pipeline.
 IPC_MESSAGE_CONTROL1(ViewHostMsg_MediaLogEvent,
                      media::MediaLogEvent /* event */)