attachment broker wip

content/common/child_process_host_impl.cc

Index: content/common/child_process_host_impl.cc
diff --git a/content/common/child_process_host_impl.cc b/content/common/child_process_host_impl.cc
index 3fa4dc89cf090a7724956b500b49ac2a2a802bab..c54f834ff840f4e3edcba91a77bc62292cb4ae16 100644
--- a/content/common/child_process_host_impl.cc
+++ b/content/common/child_process_host_impl.cc
@@ -8,7 +8,9 @@
 
 #include "base/atomic_sequence_num.h"
 #include "base/command_line.h"
+#include "base/debug/leak_annotations.h"
 #include "base/files/file_path.h"
+#include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/numerics/safe_math.h"
@@ -16,12 +18,14 @@
 #include "base/process/process_metrics.h"
 #include "base/rand_util.h"
 #include "base/strings/stringprintf.h"
+#include "base/synchronization/lock.h"
 #include "base/third_party/dynamic_annotations/dynamic_annotations.h"
 #include "content/common/child_process_messages.h"
 #include "content/common/gpu/client/gpu_memory_buffer_impl_shared_memory.h"
 #include "content/public/common/child_process_host_delegate.h"
 #include "content/public/common/content_paths.h"
 #include "content/public/common/content_switches.h"
+#include "ipc/attachment_broker.h"
 #include "ipc/ipc_channel.h"
 #include "ipc/ipc_logging.h"
 #include "ipc/message_filter.h"
@@ -30,10 +34,26 @@
 #include "base/linux_util.h"
 #elif defined(OS_WIN)
 #include "content/common/font_cache_dispatcher_win.h"
+#include "ipc/attachment_broker_win.h"
 #endif  // OS_LINUX
 
+base::LazyInstance<base::Lock>::Leaky g_attachment_broker_lock =
+    LAZY_INSTANCE_INITIALIZER;
+IPC::AttachmentBroker* g_attachment_broker = nullptr;
+
 namespace {
 
+// Makes a platform specific AttachmentBroker.
+IPC::AttachmentBroker* CreateAttachmentBroker() {
+#if defined(OS_WIN)
+  IPC::AttachmentBrokerWin* attachment_broker = new IPC::AttachmentBrokerWin;
+  ANNOTATE_LEAKING_OBJECT_PTR(attachment_broker);
+  return attachment_broker;
+#else
+  return nullptr;
+#endif  // defined(OS_WIN)
+}
+
 #if defined(OS_MACOSX)
 // Given |path| identifying a Mac-style child process executable path, adjusts
 // it to correspond to |feature|. For a child process path such as
@@ -137,6 +157,15 @@ base::FilePath ChildProcessHost::GetChildPath(int flags) {
   return child_path;
 }
 
+// static
+IPC::AttachmentBroker* ChildProcessHost::GetAttachmentBroker() {
+  base::AutoLock lock(g_attachment_broker_lock.Get());
+  if (!g_attachment_broker)
+    g_attachment_broker = CreateAttachmentBroker();
+
+  return g_attachment_broker;
+}
+
 ChildProcessHostImpl::ChildProcessHostImpl(ChildProcessHostDelegate* delegate)
     : delegate_(delegate),
       opening_channel_(false) {
@@ -165,7 +194,8 @@ void ChildProcessHostImpl::ForceShutdown() {
 
 std::string ChildProcessHostImpl::CreateChannel() {
   channel_id_ = IPC::Channel::GenerateVerifiedChannelID(std::string());
-  channel_ = IPC::Channel::CreateServer(channel_id_, this);
+  channel_ =
+      IPC::Channel::CreateServer(channel_id_, this, GetAttachmentBroker());
   if (!channel_->Connect())
     return std::string();