Remove usage of HostZoomMap from c/b/loader via ReadyToCommitNavigation

content/common/view_messages.h

 // Copyright (c) 2012 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 <stddef.h>
 #include <stdint.h>
 
@@ skipping 437 matching lines @@
 
 // Sets the page scale for the current main frame to the given page scale.
 IPC_MESSAGE_ROUTED1(ViewMsg_SetPageScale, float /* page_scale_factor */)
 
 // Change the zoom level for the current main frame.  If the level actually
 // changes, a ViewHostMsg_DidZoomURL message will be sent back to the browser
 // telling it what url got zoomed and what its current zoom level is.
 IPC_MESSAGE_ROUTED1(ViewMsg_Zoom,
                     content::PageZoom /* function */)
 
-// Set the zoom level for a particular url that the renderer is in the
-// process of loading.  This will be stored, to be used if the load commits
-// and ignored otherwise.
-IPC_MESSAGE_ROUTED2(ViewMsg_SetZoomLevelForLoadingURL,
-                    GURL /* url */,
-                    double /* zoom_level */)
-
 // Used to tell a render view whether it should expose various bindings
 // that allow JS content extended privileges.  See BindingsPolicy for valid
 // flag values.
 IPC_MESSAGE_ROUTED1(ViewMsg_AllowBindings,
                     int /* enabled_bindings_flags */)
 
 // Tell the renderer to add a property to the WebUI binding object.  This
 // only works if we allowed WebUI bindings.
 IPC_MESSAGE_ROUTED2(ViewMsg_SetWebUIProperty,
                     std::string /* property_name */,
@@ skipping 477 matching lines @@
                     int /* y */)
 
 #elif defined(OS_MACOSX)
 // Receives content of a web page as plain text.
 IPC_MESSAGE_ROUTED1(ViewMsg_GetRenderedTextCompleted, std::string)
 #endif
 
 // Adding a new message? Stick to the sort order above: first platform
 // independent ViewMsg, then ifdefs for platform specific ViewMsg, then platform
 // independent ViewHostMsg, then ifdefs for platform specific ViewHostMsg.