Migrate GpuChildThread to use ConnectionFilter instead of the ChildThread's InterfaceRegistry to exp

content/public/gpu/content_gpu_client.h

Index: content/public/gpu/content_gpu_client.h
diff --git a/content/public/gpu/content_gpu_client.h b/content/public/gpu/content_gpu_client.h
index ed348127eb9dafb3dc4bd1e7c9ca01ea51265e3d..e3126e8bda1ad10dbb48d4b974281773bcb08da8 100644
--- a/content/public/gpu/content_gpu_client.h
+++ b/content/public/gpu/content_gpu_client.h
@@ -14,8 +14,7 @@ struct GpuPreferences;
 }
 
 namespace service_manager {
-class Connector;
-class InterfaceRegistry;
+class BinderRegistry;
 }
 
 namespace content {
@@ -28,18 +27,19 @@ class CONTENT_EXPORT ContentGpuClient {
   // Initializes the client. This sets up the field trial synchronization
   // mechanism, which will notify |observer| when a field trial is activated,
   // which should be used to inform the browser process of this state.
-  virtual void Initialize(base::FieldTrialList::Observer* observer) {}
-
-  // Allows the client to expose interfaces from the GPU process to the browser
-  // process via |registry|.
-  virtual void ExposeInterfacesToBrowser(
-      service_manager::InterfaceRegistry* registry,
+  // |registry| will be passed to a ConnectionFilter (which lives on the IO
+  // thread). Unlike other childthreads, the client must register additional
+  // interfaces on this registry rather than just creating more
+  // ConnectionFilters as the ConnectionFilter that wraps this registry
+  // specifically does not bind any interface requests until after the Gpu
+  // process receives CreateGpuService() from the browser.
+  virtual void Initialize(base::FieldTrialList::Observer* observer,
+                          service_manager::BinderRegistry* registry) {}
+
+  // Called during initialization once the GpuService has been initialized.
+  virtual void GpuServiceInitialized(
       const gpu::GpuPreferences& gpu_preferences) {}
 
-  // Allow the client to bind interfaces exposed by the browser process.
-  virtual void ConsumeInterfacesFromBrowser(
-      service_manager::Connector* connector) {}
-
   // Allows client to supply a SyncPointManager instance instead of having
   // content internally create one.
   virtual gpu::SyncPointManager* GetSyncPointManager();