Extract minimal RenderViewHost interface for embedders, leaving

content/browser/download/download_request_handle.cc

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
 #include "content/browser/download/download_request_handle.h"
 
 #include "base/bind.h"
 #include "base/stringprintf.h"
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/renderer_host/resource_dispatcher_host.h"
 #include "content/browser/tab_contents/tab_contents.h"
@@ skipping 37 matching lines @@
     : rdh_(rdh),
       child_id_(child_id),
       render_view_id_(render_view_id),
       request_id_(request_id) {
   // ResourceDispatcherHost should not be null for non-default instances
   // of DownloadRequestHandle.
   DCHECK(rdh);
 }
 
 TabContents* DownloadRequestHandle::GetTabContents() const {
-  RenderViewHost* render_view_host =
-      RenderViewHost::FromID(child_id_, render_view_id_);
+  RenderViewHostImpl* render_view_host =
+      RenderViewHostImpl::FromID(child_id_, render_view_id_);
   if (!render_view_host)
     return NULL;
 
   return static_cast<TabContents*>(
-      render_view_host->delegate()->GetAsWebContents());
+      render_view_host->GetDelegate()->GetAsWebContents());
 }
 
 DownloadManager* DownloadRequestHandle::GetDownloadManager() const {
-  RenderViewHost* rvh = RenderViewHost::FromID(child_id_, render_view_id_);
+  RenderViewHostImpl* rvh = RenderViewHostImpl::FromID(
+      child_id_, render_view_id_);
   if (rvh == NULL)
     return NULL;
-  content::RenderProcessHost* rph = rvh->process();
+  content::RenderProcessHost* rph = rvh->GetProcess();
   if (rph == NULL)
     return NULL;
   content::BrowserContext* context = rph->GetBrowserContext();
   if (context == NULL)
     return NULL;
   return context->GetDownloadManager();
 }
 
 void DownloadRequestHandle::PauseRequest() const {
   // The post is safe because ResourceDispatcherHost is guaranteed
@@ skipping 31 matching lines @@
 std::string DownloadRequestHandle::DebugString() const {
   return base::StringPrintf("{"
                             " child_id = %d"
                             " render_view_id = %d"
                             " request_id = %d"
                             "}",
                             child_id_,
                             render_view_id_,
                             request_id_);
 }