Chromad: Add authentication flow

chrome/browser/chromeos/login/helper.cc

Index: chrome/browser/chromeos/login/helper.cc
diff --git a/chrome/browser/chromeos/login/helper.cc b/chrome/browser/chromeos/login/helper.cc
index 1de84556e79e258d90235f3f1fc921f7ec985692..455efaac897f54a7a0de1704bb104680b40120ab 100644
--- a/chrome/browser/chromeos/login/helper.cc
+++ b/chrome/browser/chromeos/login/helper.cc
@@ -21,6 +21,7 @@
 #include "chromeos/network/network_state_handler.h"
 #include "chromeos/network/network_util.h"
 #include "components/guest_view/browser/guest_view_manager.h"
+#include "content/public/browser/browser_thread.h"
 #include "content/public/browser/storage_partition.h"
 #include "content/public/browser/web_contents.h"
 #include "extensions/browser/guest_view/web_view/web_view_guest.h"
@@ -84,6 +85,24 @@ content::StoragePartition* GetPartition(content::WebContents* embedder,
                         : nullptr;
 }
 
+base::ScopedFD GetDataReadPipe(const std::string& data) {
+  DCHECK(content::BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
+  int pipe_fds[2];
+  if (!base::CreateLocalNonBlockingPipe(pipe_fds)) {
+    DLOG(ERROR) << "Failed to create pipe";
+    return base::ScopedFD();
+  }
+  base::ScopedFD pipe_read_end(pipe_fds[0]);
+  base::ScopedFD pipe_write_end(pipe_fds[1]);
+
+  if (!base::WriteFileDescriptor(pipe_write_end.get(), data.c_str(),
+                                 data.size())) {
+    DLOG(ERROR) << "Failed to write to pipe";
+    return base::ScopedFD();
+  }
+  return pipe_read_end;
+}
+
 }  // namespace
 
 gfx::Rect CalculateScreenBounds(const gfx::Size& size) {
@@ -243,6 +262,13 @@ net::URLRequestContextGetter* GetSigninContext() {
   return signin_partition->GetURLRequestContext();
 }
 
+void GetPipeReadEnd(const std::string& data,
+                    const OnPipeReadyCallback& callback) {
+  base::PostTaskAndReplyWithResult(
+      content::BrowserThread::GetBlockingPool(), FROM_HERE,
+      base::Bind(&GetDataReadPipe, data), callback);
+}
+
 }  // namespace login
 
 }  // namespace chromeos