Remove all uses of the global Dispatcher Get function.

ppapi/proxy/host_dispatcher.cc

Index: ppapi/proxy/host_dispatcher.cc
===================================================================
--- ppapi/proxy/host_dispatcher.cc	(revision 74021)
+++ ppapi/proxy/host_dispatcher.cc	(working copy)
@@ -30,6 +30,9 @@
       static_cast<const PPB_Var_Deprecated*>(
           local_get_interface(PPB_VAR_DEPRECATED_INTERFACE));
   SetSerializationRules(new HostVarSerializationRules(var_interface, module));
+
+  memset(plugin_interface_support_, 0,
+         sizeof(PluginInterfaceSupport) * INTERFACE_ID_COUNT);
 }
 
 HostDispatcher::~HostDispatcher() {
@@ -76,6 +79,68 @@
   return false;
 }
 
+bool HostDispatcher::OnMessageReceived(const IPC::Message& msg) {
+  // Handle common control messages.
+  if (Dispatcher::OnMessageReceived(msg))
+    return true;
+
+  if (msg.routing_id() <= 0 && msg.routing_id() >= INTERFACE_ID_COUNT) {
+    NOTREACHED();
+    // TODO(brettw): kill the plugin if it starts sending invalid messages?
+    return true;
+  }
+
+  InterfaceProxy* proxy = target_proxies_[msg.routing_id()].get();
+  if (!proxy) {
+    // Autocreate any proxy objects to handle requests from the plugin. Since
+    // we always support all known PPB_* interfaces (modulo the trusted bit),
+    // there's very little checking necessary.
+    const InterfaceProxy::Info* info = GetPPBInterfaceInfo(
+        static_cast<InterfaceID>(msg.routing_id()));
+    if (!info ||
+        (info->is_trusted && disallow_trusted_interfaces()))
+      return true;
+
+    const void* local_interface = GetLocalInterface(info->name);
+    if (!local_interface) {
+      // This should always succeed since the browser should support the stuff
+      // the proxy does. If this happens, something is out of sync.
+      NOTREACHED();
+      return true;
+    }
+
+    proxy = info->create_proxy(this, local_interface);
+    target_proxies_[info->id].reset(proxy);
+  }
+
+  return proxy->OnMessageReceived(msg);
+}
+
+const void* HostDispatcher::GetProxiedInterface(const std::string& interface) {
+  // First see if we even have a proxy for this interface.
+  const InterfaceProxy::Info* info = GetPPPInterfaceInfo(interface);
+  if (!info)
+    return NULL;
+
+  if (plugin_interface_support_[static_cast<int>(info->id)] !=
+      INTERFACE_UNQUERIED) {
+    // Already queried the plugin if it supports this interface.
+    if (plugin_interface_support_[info->id] == INTERFACE_SUPPORTED)
+      return info->interface;
+    return NULL;
+  }
+
+  // Need to re-query. Cache the result so we only do this once.
+  bool supported = false;
+  Send(new PpapiMsg_SupportsInterface(interface, &supported));
+  plugin_interface_support_[static_cast<int>(info->id)] =
+      supported ? INTERFACE_SUPPORTED : INTERFACE_UNSUPPORTED;
+
+  if (supported)
+    return info->interface;
+  return NULL;
+}
+
 }  // namespace proxy
 }  // namespace pp