Add HTMLPreloadScanner support for <link rel=preload>

third_party/WebKit/Source/core/html/parser/HTMLPreloadScannerTest.cpp

Index: third_party/WebKit/Source/core/html/parser/HTMLPreloadScannerTest.cpp
diff --git a/third_party/WebKit/Source/core/html/parser/HTMLPreloadScannerTest.cpp b/third_party/WebKit/Source/core/html/parser/HTMLPreloadScannerTest.cpp
index 6277e33b3282d0b2b38d22f06b2a59bd5a1ae19b..d1196194f72074621c85582d2dd802089d34b241 100644
--- a/third_party/WebKit/Source/core/html/parser/HTMLPreloadScannerTest.cpp
+++ b/third_party/WebKit/Source/core/html/parser/HTMLPreloadScannerTest.cpp
@@ -51,6 +51,7 @@ public:
             EXPECT_FALSE(m_preloadRequest);
             return;
         }
+        ASSERT(m_preloadRequest.get());
         EXPECT_FALSE(m_preloadRequest->isPreconnect());
         EXPECT_EQ(type, m_preloadRequest->resourceType());
         EXPECT_STREQ(url, m_preloadRequest->resourceURL().ascii().data());
@@ -361,4 +362,21 @@ TEST_F(HTMLPreloadScannerTest, testReferrerPolicy)
         test(testCase);
 }
 
+TEST_F(HTMLPreloadScannerTest, testLinkRelPreload)
+{
+    TestCase testCases[] = {
+        {"http://example.test", "<link rel=preload href=bla>", "bla", "http://example.test/", Resource::LinkSubresource, 0},
+        {"http://example.test", "<link rel=preload href=bla as=script>", "bla", "http://example.test/", Resource::Script, 0},
+        {"http://example.test", "<link rel=preload href=bla as=style>", "bla", "http://example.test/", Resource::CSSStyleSheet, 0},
+        {"http://example.test", "<link rel=preload href=bla as=image>", "bla", "http://example.test/", Resource::Image, 0},
+        {"http://example.test", "<link rel=preload href=bla as=font>", "bla", "http://example.test/", Resource::Font, 0},
+        {"http://example.test", "<link rel=preload href=bla as=audio>", "bla", "http://example.test/", Resource::Media, 0},
+        {"http://example.test", "<link rel=preload href=bla as=video>", "bla", "http://example.test/", Resource::Media, 0},
+        {"http://example.test", "<link rel=preload href=bla as=track>", "bla", "http://example.test/", Resource::TextTrack, 0},
+    };
+
+    for (const auto& testCase : testCases)
+        test(testCase);
+}
+
 } // namespace blink