Detect <link rel='manifest'> and notify embedder.

Source/web/tests/WebFrameTest.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 5395 matching lines @@
     ASSERT_TRUE(container->hasPercentHeightDescendants());
     EXPECT_EQ(2U, container->percentHeightDescendants()->size());
     EXPECT_TRUE(container->percentHeightDescendants()->contains(percentHeightInAnonymous));
     EXPECT_TRUE(container->percentHeightDescendants()->contains(percentHeightDirectChild));
 
     WebCore::RenderBlock* anonymousBlock = percentHeightInAnonymous->containingBlock();
     EXPECT_TRUE(anonymousBlock->isAnonymous());
     EXPECT_FALSE(anonymousBlock->hasPercentHeightDescendants());
 }
 
+class ManifestChangeWebFrameClient : public FrameTestHelpers::TestWebFrameClient {
+public:
+    ManifestChangeWebFrameClient() : m_manifestChangeCount(0) { }
+    virtual void didChangeManifest(WebLocalFrame*) OVERRIDE
+    {
+        ++m_manifestChangeCount;
+    }
+
+    int manifestChangeCount() { return m_manifestChangeCount; }
+
+private:
+    int m_manifestChangeCount;
+};
+
+TEST_F(WebFrameTest, NotifyManifestChange)
+{
+    registerMockedHttpURLLoad("link-manifest-change.html");
+
+    ManifestChangeWebFrameClient webFrameClient;
+    FrameTestHelpers::WebViewHelper webViewHelper;
+    webViewHelper.initializeAndLoad(m_baseURL + "link-manifest-change.html", true, &webFrameClient);
+
+    EXPECT_EQ(9, webFrameClient.manifestChangeCount());
+}
+
 } // namespace