Adds the ability for the renderer to create the mojo channel

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
index 5b9409602e2a2faf21e8551c846871ed17005dd4..35b5e9c67d3991b93d01af5ff4b50c01e80383fe 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -138,6 +138,7 @@
 #include "media/base/media_switches.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "ppapi/shared_impl/ppapi_switches.h"
+#include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/base/ui_base_switches.h"
 #include "ui/events/event_switches.h"
 #include "ui/gfx/switches.h"
@@ -158,7 +159,12 @@
 #include "content/common/media/media_stream_messages.h"
 #endif
 
-#include "third_party/skia/include/core/SkBitmap.h"
+// TODO(sky): remove, see header for details.
+#if !defined(OS_MACOSX)
+#include "content/common/mojo/mojo_channel_init.h"
+#include "content/common/mojo/mojo_messages.h"
+#include "mojo/system/embedder/platform_channel_pair.h"
+#endif
 
 extern bool g_exited_main_message_loop;
 
@@ -325,6 +331,18 @@ class RendererSandboxedProcessLauncherDelegate
 #endif  // OS_POSIX
 };
 
+// TODO(sky): remove, see header for details.
+#if !defined(OS_MACOSX)
+base::PlatformFile PlatformFileFromScopedPlatformHandle(
+    mojo::embedder::ScopedPlatformHandle handle) {
+#if defined(OS_POSIX)
+  return handle.release().fd;
+#elif defined(OS_WIN)
+  return handle.release().handle;
+#endif
+}
+#endif
+
 }  // namespace
 
 RendererMainThreadFactoryFunction g_renderer_main_thread_factory = NULL;
@@ -422,9 +440,9 @@ RenderProcessHostImpl::RenderProcessHostImpl(
       within_process_died_observer_(false),
       power_monitor_broadcaster_(this),
       geolocation_dispatcher_host_(NULL),
-      weak_factory_(this),
       screen_orientation_dispatcher_host_(NULL),
-      worker_ref_count_(0) {
+      worker_ref_count_(0),
+      weak_factory_(this) {
   widget_helper_ = new RenderWidgetHelper();
 
   ChildProcessSecurityPolicyImpl::GetInstance()->Add(GetID());
@@ -2137,4 +2155,27 @@ void RenderProcessHostImpl::DecrementWorkerRefCount() {
     Cleanup();
 }
 
+void RenderProcessHostImpl::CreateMojoChannel() {
+// TODO(sky): remove, see header for details.
+#if !defined(OS_MACOSX)
+  if (mojo_channel_init_.get())
+    return;
+
+  mojo::embedder::PlatformChannelPair channel_pair;
+  mojo_channel_init_.reset(new MojoChannelInit);
+  mojo_channel_init_->Init(
+      PlatformFileFromScopedPlatformHandle(channel_pair.PassServerHandle()),
+      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO));
+  if (mojo_channel_init_->is_handle_valid()) {
+    base::ProcessHandle process_handle = run_renderer_in_process() ?
+        base::Process::Current().handle() :
+        child_process_launcher_->GetHandle();
+    base::PlatformFile client_file =
+        PlatformFileFromScopedPlatformHandle(channel_pair.PassClientHandle());
+    Send(new MojoMsg_ChannelCreated(
+             IPC::GetFileHandleForProcess(client_file, process_handle, true)));
+  }
+#endif
+}
+
 }  // namespace content