Implement Chrome Extension TabCapture API.

chrome/browser/extensions/api/tab_capture/tab_capture_apitest.cc

+// Copyright (c) 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.
+
+#include "chrome/browser/extensions/extension_apitest.h"
+#include "chrome/common/chrome_version_info.h"
+#include "chrome/common/extensions/feature_switch.h"
+#include "chrome/common/extensions/features/feature.h"
+#include "content/public/common/content_switches.h"
+
+namespace chrome {
+
+namespace {
+
+class TabCaptureApiTest : public ExtensionApiTest {
+ public:
+  TabCaptureApiTest() : current_channel_(VersionInfo::CHANNEL_UNKNOWN) {}
+
+  // We need to enable this content flag, otherwise the tab stream gets blocked.
+  virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
+    ExtensionApiTest::SetUpCommandLine(command_line);
+    command_line->AppendSwitch(switches::kEnableTabCapture);
+  }
+
+ private:
+  extensions::Feature::ScopedCurrentChannel current_channel_;
+};
+
+}  // namespace
+
+IN_PROC_BROWSER_TEST_F(TabCaptureApiTest, TabCapture) {
+  extensions::FeatureSwitch::ScopedOverride tab_capture(
+      extensions::FeatureSwitch::tab_capture(), true);
+  ASSERT_TRUE(RunExtensionTest("tab_capture/experimental")) << message_;
+}
+
+}  // namespace chrome