Move webNavigation extension api into a separate directory

chrome/browser/extensions/api/web_navigation/web_navigation_unittest.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.
 
 // Tests common functionality used by the Chrome Extensions webNavigation API
 // implementation.
 
 #include "base/values.h"
-#include "chrome/browser/extensions/extension_webnavigation_api.h"
+#include "chrome/browser/extensions/api/web_navigation/web_navigation_api.h"
 #include "chrome/test/base/chrome_render_view_host_test_harness.h"
 #include "chrome/test/base/testing_profile.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+namespace extensions {
 
 class FrameNavigationStateTest : public ChromeRenderViewHostTestHarness {
 };
 
 // Test that a frame is correctly tracked, and removed once the tab contents
 // goes away.
 TEST_F(FrameNavigationStateTest, TrackFrame) {
   FrameNavigationState navigation_state;
   const int64 frame_id1 = 23;
   const int64 frame_id2 = 42;
@@ skipping 80 matching lines @@
 
 // Tests that no events are send for a not web-safe scheme.
 TEST_F(FrameNavigationStateTest, WebSafeScheme) {
   FrameNavigationState navigation_state;
   const int64 frame_id = 23;
   const GURL url("unsafe://www.google.com/");
 
   navigation_state.TrackFrame(frame_id, url, true, false);
   EXPECT_FALSE(navigation_state.CanSendEvents(frame_id));
 }
+
+}  // namespace extensions