DevTools: move DevToolsAgent/Client into content.

BUG=84078
TEST=

Review URL: http://codereview.chromium.org/7461019

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@93596 0039d316-1c4b-4281-b951-d872f2087c98
base::ProcessHandle BrowserRenderProcessHost::GetHandle() {
  if (run_renderer_in_process() || !child_process_launcher_.get())
    return base::Process::Current().handle();

  if (child_process_launcher_->IsStarting())
    return base::kNullProcessHandle;

  return child_process_launcher_->GetHandle();
}

base::ProcessHandle BrowserRenderProcessHost::GetHandle() {
  if (run_renderer_in_process() || !child_process_launcher_.get())
    return base::Process::Current().handle();

  if (child_process_launcher_->IsStarting())
    return base::kNullProcessHandle;

  return child_process_launcher_->GetHandle();
}
