win: Implement CrashpadClient::StartHandler()

test/win/child_launcher.h

Index: test/win/child_launcher.h
diff --git a/test/win/child_launcher.h b/test/win/child_launcher.h
index 456d969d17eba5d78bd3b81fbfac35f6a617f97c..22463fa5a741614ef17edbc6eb642a7079a06b7e 100644
--- a/test/win/child_launcher.h
+++ b/test/win/child_launcher.h
@@ -42,7 +42,7 @@ class ChildLauncher {
   void Start();
 
   //! \brief Waits for the child process to exit.
-  //! 
+  //!
   //! \return The process exit code.
   DWORD WaitForExit();
 
@@ -67,14 +67,6 @@ class ChildLauncher {
   ScopedFileHANDLE stdin_write_handle_;
 };
 
-//! \brief Utility function for building escaped command lines.
-//!
-//! \param[in] argument Appended to \a command_line surrounded by properly
-//!     escaped quotation marks, if necessary.
-//! \param[inout] command_line The command line being constructed.
-void AppendCommandLineArgument(const std::wstring& argument,
-                               std::wstring* command_line);
-
 }  // namespace test
 }  // namespace crashpad