ozone: ClientPixmapManager passes VGEM fd from browser to renderer.

content/child/child_thread_impl.cc

Index: content/child/child_thread_impl.cc
diff --git a/content/child/child_thread_impl.cc b/content/child/child_thread_impl.cc
index 3978af0b74a438b49b1758b62803fa11f0f28ca1..e720fa4869dd600377d2ae6cee0305923cd7f05b 100644
--- a/content/child/child_thread_impl.cc
+++ b/content/child/child_thread_impl.cc
@@ -68,6 +68,10 @@
 #include "content/child/child_io_surface_manager_mac.h"
 #endif
 
+#if defined(USE_OZONE)
+#include "ui/ozone/public/client_native_pixmap_factory.h"
+#endif
+
 #if defined(OS_WIN)
 #include "ipc/attachment_broker_unprivileged_win.h"
 #endif
@@ -192,6 +196,31 @@ class IOSurfaceManagerFilter : public IPC::MessageFilter {
 };
 #endif
 
+#if defined(USE_OZONE)
+class ClientNativePixmapFactoryFilter : public IPC::MessageFilter {
+ public:
+  // Overridden from IPC::MessageFilter:
+  bool OnMessageReceived(const IPC::Message& message) override {
+    bool handled = true;
+    IPC_BEGIN_MESSAGE_MAP(ClientNativePixmapFactoryFilter, message)
+      IPC_MESSAGE_HANDLER(ChildProcessMsg_InitializeClientNativePixmapFactory,
+                          OnInitializeClientNativePixmapFactory)
+      IPC_MESSAGE_UNHANDLED(handled = false)
+    IPC_END_MESSAGE_MAP()
+    return handled;
+  }
+
+ protected:
+  ~ClientNativePixmapFactoryFilter() override {}
+
+  void OnInitializeClientNativePixmapFactory(
+      const base::FileDescriptor& device_fd) {
+    ui::ClientNativePixmapFactory::GetInstance()->Initialize(

[jam, 2015/08/24 15:00:32]

do you specifically want this to happen on the IO thread? is the class you're
calling thread safe?

i.e. why are you using a filter?

+        base::ScopedFD(device_fd.fd));
+  }
+};
+#endif
+
 #if defined(OS_ANDROID)
 // A class that allows for triggering a clean shutdown from another
 // thread through draining the main thread's msg loop.
@@ -428,6 +457,10 @@ void ChildThreadImpl::Init(const Options& options) {
   channel_->AddFilter(new IOSurfaceManagerFilter());
 #endif
 
+#if defined(USE_OZONE)
+  channel_->AddFilter(new ClientNativePixmapFactoryFilter());
+#endif
+
   // Add filters passed here via options.
   for (auto startup_filter : options.startup_filters) {
     channel_->AddFilter(startup_filter);