Moved the following IPC messages used by the chrome NPAPI plugin installer out of content

content/common/plugin_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 message file, hence no include guard.
 
 #include "build/build_config.h"
 #include "content/common/common_param_traits.h"
 #include "content/common/webkit_param_traits.h"
 #include "ipc/ipc_channel_handle.h"
@@ skipping 65 matching lines @@
 IPC_MESSAGE_CONTROL0(PluginProcessMsg_NotifyRenderersOfPendingShutdown)
 
 
 //-----------------------------------------------------------------------------
 // PluginProcessHost messages
 // These are messages sent from the plugin process to the browser process.
 // Response to a PluginProcessMsg_CreateChannel message.
 IPC_MESSAGE_CONTROL1(PluginProcessHostMsg_ChannelCreated,
                      IPC::ChannelHandle /* channel_handle */)
 
-IPC_SYNC_MESSAGE_CONTROL0_1(PluginProcessHostMsg_GetPluginFinderUrl,
-                            std::string /* plugin finder URL */)
-
 #if defined(OS_WIN)
 // Destroys the given window's parent on the UI thread.
 IPC_MESSAGE_CONTROL2(PluginProcessHostMsg_PluginWindowDestroyed,
                      HWND /* window */,
                      HWND /* parent */)
 
-IPC_MESSAGE_CONTROL2(PluginProcessHostMsg_DownloadUrl,
-                     std::string /* URL */,
-                     HWND /* caller window */)
-
 IPC_MESSAGE_CONTROL2(PluginProcessHostMsg_ReparentPluginWindow,
                      HWND /* window */,
                      HWND /* parent */)
 #endif
 
 #if defined(USE_X11)
 // On X11, the mapping between NativeViewId and X window ids
 // is known only to the browser.  This message lets the plugin process
 // ask about a NativeViewId that was provided by the renderer.
 // It will get 0 back if it's a bogus input.
@@ skipping 145 matching lines @@
                     GURL /* url */,
                     PluginMsg_DidReceiveResponseParams)
 
 IPC_MESSAGE_ROUTED1(PluginMsg_DidReceiveManualData,
                     std::vector<char> /* buffer */)
 
 IPC_MESSAGE_ROUTED0(PluginMsg_DidFinishManualLoading)
 
 IPC_MESSAGE_ROUTED0(PluginMsg_DidManualLoadFail)
 
-IPC_MESSAGE_ROUTED0(PluginMsg_InstallMissingPlugin)
-
 IPC_MESSAGE_ROUTED3(PluginMsg_HandleURLRequestReply,
                     unsigned long /* resource_id */,
                     GURL /* url */,
                     int /* notify_id */)
 
 IPC_MESSAGE_ROUTED2(PluginMsg_HTTPRangeRequestReply,
                     unsigned long /* resource_id */,
                     int /* range_request_id */)
 
 IPC_MESSAGE_CONTROL1(PluginMsg_SignalModalDialogEvent,
@@ skipping 56 matching lines @@
 IPC_MESSAGE_ROUTED3(PluginHostMsg_SetCookie,
                     GURL /* url */,
                     GURL /* first_party_for_cookies */,
                     std::string /* cookie */)
 
 IPC_SYNC_MESSAGE_ROUTED2_1(PluginHostMsg_GetCookies,
                            GURL /* url */,
                            GURL /* first_party_for_cookies */,
                            std::string /* cookies */)
 
-IPC_MESSAGE_ROUTED1(PluginHostMsg_MissingPluginStatus,
-                    int /* status */)
-
 IPC_MESSAGE_ROUTED0(PluginHostMsg_CancelDocumentLoad)
 
 IPC_MESSAGE_ROUTED3(PluginHostMsg_InitiateHTTPRangeRequest,
                     std::string /* url */,
                     std::string /* range_info */,
                     int         /* range_request_id */)
 
 IPC_MESSAGE_ROUTED2(PluginHostMsg_DeferResourceLoading,
                     unsigned long /* resource_id */,
                     bool /* defer */)
@@ skipping 116 matching lines @@
 IPC_SYNC_MESSAGE_ROUTED1_2(NPObjectMsg_Construct,
                            std::vector<NPVariant_Param> /* args */,
                            NPVariant_Param /* result_param */,
                            bool /* result */)
 
 IPC_SYNC_MESSAGE_ROUTED2_2(NPObjectMsg_Evaluate,
                            std::string /* script */,
                            bool /* popups_allowed */,
                            NPVariant_Param /* result_param */,
                            bool /* result */)