Clarifying the parameters ownership of BrowserChildProcessHost::Launch()

content/browser/renderer_host/render_process_host_impl.cc

 // Copyright 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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 865 matching lines @@
     in_process_renderer_->StartWithOptions(options);
 
     g_in_process_thread = in_process_renderer_->message_loop();
 
     // Make sure any queued messages on the channel are flushed in the case
     // where we aren't launching a child process.
     channel_->Flush();
   } else {
     // Build command line for renderer.  We call AppendRendererCommandLine()
     // first so the process type argument will appear first.
-    base::CommandLine* cmd_line = new base::CommandLine(renderer_path);
+    std::unique_ptr<base::CommandLine> cmd_line =
+        base::MakeUnique<base::CommandLine>(renderer_path);
     if (!renderer_prefix.empty())
       cmd_line->PrependWrapper(renderer_prefix);
-    AppendRendererCommandLine(cmd_line);
+    AppendRendererCommandLine(cmd_line.get());
 
     // Spawn the child process asynchronously to avoid blocking the UI thread.
     // As long as there's no renderer prefix, we can use the zygote process
     // at this stage.
     child_process_launcher_.reset(new ChildProcessLauncher(
-        new RendererSandboxedProcessLauncherDelegate(), cmd_line, GetID(), this,
-        child_token_, base::Bind(&RenderProcessHostImpl::OnMojoError, id_)));
+        base::MakeUnique<RendererSandboxedProcessLauncherDelegate>(),
+        std::move(cmd_line), GetID(), this, child_token_,
+        base::Bind(&RenderProcessHostImpl::OnMojoError, id_)));
     channel_->Pause();
 
     fast_shutdown_started_ = false;
   }
 
   if (!gpu_observer_registered_) {
     gpu_observer_registered_ = true;
     ui::GpuSwitchingManager::GetInstance()->AddObserver(this);
   }
 
@@ skipping 2115 matching lines @@
   LOG(ERROR) << "Terminating render process for bad Mojo message: " << error;
 
   // The ReceivedBadMessage call below will trigger a DumpWithoutCrashing.
   // Capture the error message in a crash key value.
   base::debug::ScopedCrashKey error_key_value("mojo-message-error", error);
   bad_message::ReceivedBadMessage(render_process_id,
                                   bad_message::RPH_MOJO_PROCESS_ERROR);
 }
 
 }  // namespace content