Revert of Make RenderProcessHost/RenderThread use MojoChildConnection/MojoShellConnection

content/child/child_thread_impl.h

Index: content/child/child_thread_impl.h
diff --git a/content/child/child_thread_impl.h b/content/child/child_thread_impl.h
index a59ca84b6d99a3561b6d1533a1ad6a3d56127346..1ca22473af0e79fe55861880ed6af5aa256e4c8f 100644
--- a/content/child/child_thread_impl.h
+++ b/content/child/child_thread_impl.h
@@ -24,7 +24,6 @@
 #include "ipc/ipc_message.h"  // For IPC_MESSAGE_LOG_ENABLED.
 #include "ipc/ipc_platform_file.h"
 #include "ipc/message_router.h"
-#include "services/shell/public/cpp/shell_client.h"
 
 namespace base {
 class MessageLoop;
@@ -69,8 +68,7 @@
 // The main thread of a child process derives from this class.
 class CONTENT_EXPORT ChildThreadImpl
     : public IPC::Listener,
-      virtual public ChildThread,
-      public NON_EXPORTED_BASE(shell::ShellClient){
+      virtual public ChildThread {
  public:
   struct CONTENT_EXPORT Options;
 
@@ -98,13 +96,8 @@
 #endif
   void RecordAction(const base::UserMetricsAction& action) override;
   void RecordComputedAction(const std::string& action) override;
-  MojoShellConnection* GetMojoShellConnection() override;
   shell::InterfaceRegistry* GetInterfaceRegistry() override;
   shell::InterfaceProvider* GetRemoteInterfaces() override;
-
-  // shell::ShellClient:
-  shell::InterfaceRegistry* GetInterfaceRegistryForConnection() override;
-  shell::InterfaceProvider* GetInterfaceProviderForConnection() override;
 
   IPC::SyncChannel* channel() { return channel_.get(); }
 
@@ -254,11 +247,7 @@
   void EnsureConnected();
 
   std::unique_ptr<mojo::edk::ScopedIPCSupport> mojo_ipc_support_;
-  bool use_mojo_shell_connection_ = false;
   std::unique_ptr<MojoApplication> mojo_application_;
-  std::unique_ptr<MojoShellConnection> mojo_shell_connection_;
-  std::unique_ptr<shell::InterfaceRegistry> interface_registry_;
-  std::unique_ptr<shell::InterfaceProvider> remote_interfaces_;
 
   std::string channel_name_;
   std::unique_ptr<IPC::SyncChannel> channel_;
@@ -329,7 +318,6 @@
   std::vector<IPC::MessageFilter*> startup_filters;
   std::string in_process_ipc_token;
   std::string in_process_application_token;
-  bool use_mojo_shell_connection = false;
 
  private:
   Options();
@@ -343,7 +331,6 @@
   Builder& UseMojoChannel(bool use_mojo_channel);
   Builder& WithChannelName(const std::string& channel_name);
   Builder& AddStartupFilter(IPC::MessageFilter* filter);
-  Builder& UseMojoShellConnection(bool use_mojo_shell_connection);
 
   Options Build();