Remove the flags to RenderViewHost::EnablePreferredSizeMode since it's not used after http://crbu...

content/common/view_message_enums.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.
 
 #ifndef CONTENT_COMMON_VIEW_MESSAGES_ENUMS_H_
 #define CONTENT_COMMON_VIEW_MESSAGES_ENUMS_H_
 
 struct ViewHostMsg_AccEvent {
   enum Value {
     // The active descendant of a node has changed.
@@ skipping 51 matching lines @@
     TEXT_INSERTED,
 
     // Text was removed in a node with text content.
     TEXT_REMOVED,
 
     // The node value has changed.
     VALUE_CHANGED,
   };
 };
 
-// Values that may be OR'd together to form the 'flags' parameter of the
-// ViewMsg_EnablePreferredSizeChangedMode message.
-enum ViewHostMsg_EnablePreferredSizeChangedMode_Flags {
-  kPreferredSizeNothing,
-  kPreferredSizeWidth = 1 << 0,
-  // Requesting the height currently requires a polling loop in render_view.cc.
-  kPreferredSizeHeightThisIsSlow = 1 << 1,
-};
-
 struct ViewHostMsg_RunFileChooser_Mode {
  public:
   enum Value {
     // Requires that the file exists before allowing the user to pick it.
     Open,
 
     // Like Open, but allows picking multiple files to open.
     OpenMultiple,
 
     // Like Open, but selects a folder.
@@ skipping 54 matching lines @@
     kActivateSelection
   };
 
   ViewMsg_StopFinding_Params() : action(kClearSelection) {}
 
   // The action that should be taken when the find is completed.
   Action action;
 };
 
 #endif  // CONTENT_COMMON_VIEW_MESSAGES_ENUMS_H_