Beginning of support for extension content verification

extensions/browser/content_verify_job.cc

Index: extensions/browser/content_verify_job.cc
diff --git a/extensions/browser/content_verify_job.cc b/extensions/browser/content_verify_job.cc
new file mode 100644
index 0000000000000000000000000000000000000000..8a72e3bc94c3cc49139b9d49430afa4966156ecf
--- /dev/null
+++ b/extensions/browser/content_verify_job.cc
@@ -0,0 +1,61 @@
+// Copyright 2014 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.
+
+#include "extensions/browser/content_verify_job.h"
+
+#include <algorithm>
+
+#include "base/stl_util.h"
+#include "base/task_runner_util.h"
+#include "content/public/browser/browser_thread.h"
+
+namespace extensions {
+
+namespace {
+
+ContentVerifyJob::TestDelegate* g_test_delegate = NULL;
+
+}  // namespace
+
+ContentVerifyJob::ContentVerifyJob(const std::string& extension_id,
+                                   const FailureCallback& failure_callback)
+    : extension_id_(extension_id), failure_callback_(failure_callback) {
+}
+
+ContentVerifyJob::~ContentVerifyJob() {
+}
+
+void ContentVerifyJob::Start() {
+}
+
+void ContentVerifyJob::BytesRead(int count, const char* data) {
+  if (g_test_delegate) {
+    FailureReason reason =
+        g_test_delegate->BytesRead(extension_id_, count, data);
+    if (reason != NONE)
+      return DispatchFailureCallback(reason);

[Yoyo Zhou, 2014/05/07 02:25:59]

Why are we returning from a void?

[asargent_no_longer_on_chrome, 2014/05/07 06:56:42]

Just a shorthand for:

if (reason != NONE) {
  DispatchFailureCallback(reason);
  return;
}

Since you found it surprising, clearly this idiom isn't that common, so I just
changed it to the longhand verison. 

+  }
+}
+
+void ContentVerifyJob::DoneReading() {
+  if (g_test_delegate) {
+    FailureReason reason = g_test_delegate->DoneReading(extension_id_);
+    if (reason != NONE)
+      return DispatchFailureCallback(reason);
+  }
+}
+
+// static
+void ContentVerifyJob::SetDelegateForTests(TestDelegate* delegate) {
+  g_test_delegate = delegate;
+}
+
+void ContentVerifyJob::DispatchFailureCallback(FailureReason reason) {
+  if (!failure_callback_.is_null()) {
+    failure_callback_.Run(reason);
+    failure_callback_.Reset();
+  }
+}
+
+}  // namespace extensions