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

chrome/common/render_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.
 
 // Multiply-included file, no traditional include guard.
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
@@ skipping 270 matching lines @@
                     bool /* allowed */)
 
 // Sent in response to ViewHostMsg_DidBlockRunningInsecureContent.
 IPC_MESSAGE_ROUTED1(ChromeViewMsg_SetAllowRunningInsecureContent,
                     bool /* allowed */)
 
 // Sent when the profile changes the kSafeBrowsingEnabled preference.
 IPC_MESSAGE_ROUTED1(ChromeViewMsg_SetClientSidePhishingDetection,
                     bool /* enable_phishing_detection */)
 
+// JavaScript related messages -----------------------------------------------
+
+// Notify the JavaScript engine in the render to change its parameters
+// while performing stress testing.
+IPC_MESSAGE_ROUTED2(ChromeViewMsg_JavaScriptStressTestControl,
+                    int /* cmd */,
+                    int /* param */)
+
 //-----------------------------------------------------------------------------
 // TabContents messages
 // These are messages sent from the renderer to the browser process.
 
 // Provides the contents for the given page that was loaded recently.
 IPC_MESSAGE_ROUTED3(ChromeViewHostMsg_PageContents,
                     GURL         /* URL of the page */,
                     int32        /* page id */,
                     string16     /* page contents */)
 
@@ skipping 212 matching lines @@
 
 IPC_MESSAGE_ROUTED3(ChromeViewHostMsg_SetSuggestions,
                     int32 /* page_id */,
                     std::vector<std::string> /* suggestions */,
                     InstantCompleteBehavior)
 
 IPC_MESSAGE_ROUTED2(ChromeViewHostMsg_InstantSupportDetermined,
                     int32 /* page_id */,
                     bool  /* result */)
 
-// JavaScript related messages -----------------------------------------------
+// The currently displayed PDF has an unsupported feature.
+IPC_MESSAGE_ROUTED0(ChromeViewHostMsg_PDFHasUnsupportedFeature)
 
-// Notify the JavaScript engine in the render to change its parameters
-// while performing stress testing.
-IPC_MESSAGE_ROUTED2(ChromeViewMsg_JavaScriptStressTestControl,
-                    int /* cmd */,
-                    int /* param */)