Handle interface to prerenders.

chrome/browser/prerender/prerender_handle.cc

+// 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 "chrome/browser/prerender/prerender_handle.h"
+
+#include "base/basictypes.h"
+#include "chrome/browser/prerender/prerender_contents.h"
+
+namespace prerender {
+
+PrerenderHandleImpl::~PrerenderHandleImpl() {
+}
+
+bool PrerenderHandleImpl::IsPending() const {
+  DCHECK(CalledOnValidThread());
+  return !contents_;
+}
+
+bool PrerenderHandleImpl::DidFinishLoading() const {
+  DCHECK(CalledOnValidThread());
+  if (IsPending())
+    return false;
+  return contents_->has_finished_loading();
+}
+
+void PrerenderHandleImpl::Release() {
+  DVLOG(4) << "PrerenderHandleImpl::Release()";
+  contents_->DecrementClientCount();
+}
+
+PrerenderHandleImpl::PrerenderHandleImpl() : contents_(NULL) {
+}
+
+void PrerenderHandleImpl::AddDuplicate(
+    PrerenderHandleImpl* new_duplicate_handle) {
+  DCHECK(new_duplicate_handle->IsPending());
+  PrerenderHandleImpl* old_duplicate_handle = duplicate_handle_.release();
+
+  new_duplicate_handle->contents_ = contents_;
+  new_duplicate_handle->duplicate_handle_.reset(old_duplicate_handle);
+  duplicate_handle_.reset(new_duplicate_handle);
+
+  contents_->IncrementClientCount();
+}
+
+void PrerenderHandleImpl::AddClient() {
+  contents_->IncrementClientCount();
+}
+
+void PrerenderHandleImpl::SetContents(PrerenderContents* contents) {
+  contents_ = contents;
+  if (duplicate_handle_.get())
+    duplicate_handle_->SetContents(contents);
+}
+
+}  // namespace prerender