Extract minimal RenderViewHost interface for embedders, leaving

content/browser/renderer_host/render_widget_host_view_mac_editcommand_helper.mm

 // 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.
 
 #import "content/browser/renderer_host/render_widget_host_view_mac_editcommand_helper.h"
 
 #import <objc/runtime.h>
 
 #include "content/browser/renderer_host/render_widget_host.h"
 #import "content/browser/renderer_host/render_widget_host_view_mac.h"
@@ skipping 119 matching lines @@
   // SEL -> command name string.
   NSString* command_name_ns =
       RenderWidgetHostViewMacEditCommandHelper::CommandNameForSelector(_cmd);
   std::string command([command_name_ns UTF8String]);
 
   // Forward the edit command string down the pipeline.
   RenderWidgetHostViewMac* rwhv = [(id<RenderWidgetHostViewMacOwner>)self
       renderWidgetHostViewMac];
   DCHECK(rwhv);
 
+  RenderWidgetHostImpl* rwh =
+      RenderWidgetHostImpl::From(rwhv->GetRenderWidgetHost());
   // The second parameter is the core command value which isn't used here.
-  RenderWidgetHostImpl* rwh = RenderWidgetHostImpl::FromRWHV(rwhv);
   rwh->ExecuteEditCommand(command, "");
 }
 
 }  // namespace
 
 // Maps an objc-selector to a core command name.
 //
 // Returns the core command name (which is the selector name with the trailing
 // ':' stripped in most cases).
 //
@@ skipping 74 matching lines @@
 NSArray* RenderWidgetHostViewMacEditCommandHelper::GetEditSelectorNames() {
   size_t num_edit_commands = arraysize(kEditCommands);
   NSMutableArray* ret = [NSMutableArray arrayWithCapacity:num_edit_commands];
 
   for (size_t i = 0; i < num_edit_commands; ++i) {
       [ret addObject:[NSString stringWithUTF8String:kEditCommands[i]]];
   }
 
   return ret;
 }