Wire up process launch error codes.

content/browser/child_process_launcher.h

 // Copyright (c) 2012 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 CONTENT_BROWSER_CHILD_PROCESS_LAUNCHER_H_
 #define CONTENT_BROWSER_CHILD_PROCESS_LAUNCHER_H_
 
 #include "base/files/scoped_file.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/process/kill.h"
 #include "base/process/launch.h"
 #include "base/process/process.h"
 #include "base/threading/non_thread_safe.h"
 #include "build/build_config.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/common/sandboxed_process_launcher_delegate.h"
 #include "mojo/edk/embedder/platform_channel_pair.h"
 
+#if defined(OS_WIN)
+#include "sandbox/win/src/sandbox_types.h"
+#endif
+
 namespace base {
 class CommandLine;
 }
 
 namespace content {
 
+// Note: These codes are listed in a histogram and any new codes should be added
+// at the end.
+enum LaunchResultCode {
+  // Launch start code, to not overlap with sandbox::ResultCode.
+  LAUNCH_RESULT_START = 1001,
+  // Launch success.
+  LAUNCH_RESULT_SUCCESS,
+  // Generic launch failure.
+  LAUNCH_RESULT_FAILURE,
+  // Placeholder for last item of the enum.
+  LAUNCH_RESULT_CODE_LAST_CODE
+};
+
+#if defined(OS_WIN)
+static_assert(static_cast<int>(LAUNCH_RESULT_START) >
+                  static_cast<int>(sandbox::SBOX_ERROR_LAST),
+              "LaunchResultCode must not overlap with sandbox::ResultCode");
+#endif
+
 // Launches a process asynchronously and notifies the client of the process
 // handle when it's available.  It's used to avoid blocking the calling thread
 // on the OS since often it can take > 100 ms to create the process.
 class CONTENT_EXPORT ChildProcessLauncher : public base::NonThreadSafe {
  public:
   class CONTENT_EXPORT Client {
    public:
     // Will be called on the thread that the ChildProcessLauncher was
     // constructed on.
     virtual void OnProcessLaunched() = 0;
 
-    virtual void OnProcessLaunchFailed() {};
+    virtual void OnProcessLaunchFailed(int error_code) {};
 
    protected:
     virtual ~Client() {}
   };
 
   // Launches the process asynchronously, calling the client when the result is
   // ready.  Deleting this object before the process is created is safe, since
   // the callback won't be called.  If the process is still running by the time
   // this object destructs, it will be terminated.
   // Takes ownership of cmd_line.
@@ skipping 45 matching lines @@
   // to launch the child process on the launcher thread.
   // It makes sure we always perform the necessary cleanup if the
   // client went away.
   static void DidLaunch(base::WeakPtr<ChildProcessLauncher> instance,
                         bool terminate_on_shutdown,
                         ZygoteHandle zygote,
 #if defined(OS_ANDROID)
                         base::ScopedFD ipcfd,
                         base::ScopedFD mojo_fd,
 #endif
-                        base::Process process);
+                        base::Process process,
+                        int error_code);
 
   // Notifies the client about the result of the operation.
   void Notify(ZygoteHandle zygote,
 #if defined(OS_ANDROID)
               base::ScopedFD ipcfd,
 #endif
-              base::Process process);
+              base::Process process,
+              int error_code);
 
 #if defined(MOJO_SHELL_CLIENT)
   // When this process is run from an external Mojo shell, this function will
   // create a channel and pass one end to the spawned process and register the
   // other end with the external shell, allowing the spawned process to bind an
   // Application request from the shell.
   void CreateMojoShellChannel(base::CommandLine* command_line,
                               int child_process_id);
 #endif
 
@@ skipping 12 matching lines @@
   mojo::edk::PlatformChannelPair mojo_platform_channel_;
 
   base::WeakPtrFactory<ChildProcessLauncher> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChildProcessLauncher);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_CHILD_PROCESS_LAUNCHER_H_