Mojo: Add NotifyBadMessage API

mojo/edk/embedder/embedder.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MOJO_EDK_EMBEDDER_EMBEDDER_H_
 #define MOJO_EDK_EMBEDDER_EMBEDDER_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 11 matching lines @@
 
 namespace base {
 class PortProvider;
 }
 
 namespace mojo {
 namespace edk {
 
 class ProcessDelegate;
 
+using ProcessErrorCallback = base::Callback<void(const std::string& error)>;
+
 // Basic configuration/initialization ------------------------------------------
 
 // |Init()| sets up the basic Mojo system environment, making the |Mojo...()|
 // functions available and functional. This is never shut down (except in tests
 // -- see test_embedder.h).
 
 // Allows changing the default max message size. Must be called before Init.
 MOJO_SYSTEM_IMPL_EXPORT void SetMaxMessageSize(size_t bytes);
 
 // Called in the parent process for each child process that is launched.
 MOJO_SYSTEM_IMPL_EXPORT void ChildProcessLaunched(
     base::ProcessHandle child_process,
     ScopedPlatformHandle server_pipe,
     const std::string& child_token);
 
+// Called in the parent process for each child process that is launched.
+// |process_error_callback| is called if the system becomes aware of some
+// internal error related to this process, e.g., if the system is notified of a
+// bad message from this process via the |MojoNotifyBadMessage()| API.
+MOJO_SYSTEM_IMPL_EXPORT void ChildProcessLaunched(
+    base::ProcessHandle child_process,
+    ScopedPlatformHandle server_pipe,
+    const std::string& child_token,
+    const ProcessErrorCallback& error_callback);
+
 // Called in the parent process when a child process fails to launch.
 // Exactly one of ChildProcessLaunched() or ChildProcessLaunchFailed() must be
 // called per child process launch attempt.
 MOJO_SYSTEM_IMPL_EXPORT void ChildProcessLaunchFailed(
     const std::string& child_token);
 
 // Should be called as early as possible in the child process with the handle
 // that the parent received from ChildProcessLaunched.
 MOJO_SYSTEM_IMPL_EXPORT void SetParentPipeHandle(ScopedPlatformHandle pipe);
 
@@ skipping 117 matching lines @@
 
 // Generates a random ASCII token string for use with CreateParentMessagePipe()
 // and CreateChildMessagePipe() above. The generated token is suitably random so
 // as to not have to worry about collisions with other generated tokens.
 MOJO_SYSTEM_IMPL_EXPORT std::string GenerateRandomToken();
 
 }  // namespace edk
 }  // namespace mojo
 
 #endif  // MOJO_EDK_EMBEDDER_EMBEDDER_H_