Add a Content API around BrowserChildProcessHost, similar to what was done with ChildProcessHost....

content/public/browser/browser_child_process_host_iterator.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 "content/public/browser/browser_child_process_host_iterator.h"
+
+#include "base/logging.h"
+#include "content/browser/browser_child_process_host.h"
+#include "content/public/browser/browser_thread.h"
+
+namespace content {
+
+BrowserChildProcessHostIterator::BrowserChildProcessHostIterator()
+    : all_(true), type_(content::PROCESS_TYPE_UNKNOWN) {
+  CHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)) <<
+        "BrowserChildProcessHostIterator must be used on the IO thread.";
+  iterator_ = ::BrowserChildProcessHost::GetIterator()->begin();
+}
+
+BrowserChildProcessHostIterator::BrowserChildProcessHostIterator(
+    content::ProcessType type)
+    : all_(false), type_(type) {
+  CHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)) <<
+        "BrowserChildProcessHostIterator must be used on the IO thread.";
+  iterator_ = ::BrowserChildProcessHost::GetIterator()->begin();
+  if (!Done() && (*iterator_)->GetData().type != type_)
+    ++(*this);
+}
+
+bool BrowserChildProcessHostIterator::operator++() {
+  CHECK(!Done());
+  do {
+    ++iterator_;
+    if (Done())
+      break;
+
+    if (!all_ && (*iterator_)->GetData().type != type_)
+      continue;
+
+    return true;
+  } while (true);
+
+  return false;
+}
+
+bool BrowserChildProcessHostIterator::Done() {
+  return iterator_ == ::BrowserChildProcessHost::GetIterator()->end();
+}
+
+const ChildProcessData& BrowserChildProcessHostIterator::GetData() {
+  CHECK(!Done());
+  return (*iterator_)->GetData();
+}
+
+bool BrowserChildProcessHostIterator::Send(IPC::Message* message) {
+  CHECK(!Done());
+  return (*iterator_)->Send(message);
+}
+
+BrowserChildProcessHostDelegate*
+    BrowserChildProcessHostIterator::GetDelegate() {
+  return (*iterator_)->delegate();
+}
+
+}  // namespace content