Fix a double download issue on desktop

Source/core/html/parser/HTMLPreloadScannerTest.cpp

Index: Source/core/html/parser/HTMLPreloadScannerTest.cpp
diff --git a/Source/core/html/parser/HTMLPreloadScannerTest.cpp b/Source/core/html/parser/HTMLPreloadScannerTest.cpp
index b6caafef48c30af691ec18f58e0808e196185f67..55a257f377b004b03816e6c6a391d78d35c46a69 100644
--- a/Source/core/html/parser/HTMLPreloadScannerTest.cpp
+++ b/Source/core/html/parser/HTMLPreloadScannerTest.cpp
@@ -8,6 +8,7 @@
 #include "core/MediaTypeNames.h"
 #include "core/css/MediaValuesCached.h"
 #include "core/fetch/ClientHintsPreferences.h"
+#include "core/frame/Settings.h"
 #include "core/html/parser/HTMLParserOptions.h"
 #include "core/html/parser/HTMLResourcePreloader.h"
 #include "core/testing/DummyPageHolder.h"
@@ -72,13 +73,20 @@ protected:
         return MediaValuesCached::create(data);
     }
 
-    virtual void SetUp()
+    void runSetUp(bool viewportEnabled)
     {
         HTMLParserOptions options(&m_dummyPageHolder->document());
         KURL documentURL(ParsedURLString, "http://whatever.test/");
+        m_dummyPageHolder->document().settings()->setViewportEnabled(viewportEnabled);
+        m_dummyPageHolder->document().settings()->setViewportMetaEnabled(viewportEnabled);
         m_scanner = HTMLPreloadScanner::create(options, documentURL, CachedDocumentParameters::create(&m_dummyPageHolder->document(), createMediaValues()));
     }
 
+    virtual void SetUp()
+    {
+        runSetUp(true);
+    }
+
     void test(TestCase testCase)
     {
         MockHTMLResourcePreloader preloader;
@@ -138,6 +146,29 @@ TEST_F(HTMLPreloadScannerTest, testImagesWithViewport)
         test(testCase);
 }
 
+TEST_F(HTMLPreloadScannerTest, testImagesWithViewportDisabled)
+{
+    runSetUp(false);
+    TestCase testCases[] = {
+        {"http://example.test", "<meta name=viewport content='width=160'><img src='bla.gif'>", "bla.gif", "http://example.test/", Resource::Image, 0},
+        {"http://example.test", "<img srcset='bla.gif 320w, blabla.gif 640w'>", "blabla.gif", "http://example.test/", Resource::Image, 0},
+        {"http://example.test", "<img sizes='50vw' src='bla.gif'>", "bla.gif", "http://example.test/", Resource::Image, 0},
+        {"http://example.test", "<img sizes='50vw' src='bla.gif' srcset='bla2.gif 1x'>", "bla2.gif", "http://example.test/", Resource::Image, 0},
+        {"http://example.test", "<img sizes='50vw' src='bla.gif' srcset='bla2.gif 0.5x'>", "bla.gif", "http://example.test/", Resource::Image, 0},
+        {"http://example.test", "<img sizes='50vw' src='bla.gif' srcset='bla2.gif 100w'>", "bla2.gif", "http://example.test/", Resource::Image, 250},
+        {"http://example.test", "<img sizes='50vw' src='bla.gif' srcset='bla2.gif 100w, bla3.gif 250w'>", "bla3.gif", "http://example.test/", Resource::Image, 250},
+        {"http://example.test", "<img sizes='50vw' src='bla.gif' srcset='bla2.gif 100w, bla3.gif 250w, bla4.gif 500w'>", "bla4.gif", "http://example.test/", Resource::Image, 250},
+        {"http://example.test", "<img src='bla.gif' srcset='bla2.gif 100w, bla3.gif 250w, bla4.gif 500w' sizes='50vw'>", "bla4.gif", "http://example.test/", Resource::Image, 250},
+        {"http://example.test", "<img src='bla.gif' sizes='50vw' srcset='bla2.gif 100w, bla3.gif 250w, bla4.gif 500w'>", "bla4.gif", "http://example.test/", Resource::Image, 250},
+        {"http://example.test", "<img sizes='50vw' srcset='bla2.gif 100w, bla3.gif 250w, bla4.gif 500w' src='bla.gif'>", "bla4.gif", "http://example.test/", Resource::Image, 250},
+        {"http://example.test", "<img srcset='bla2.gif 100w, bla3.gif 250w, bla4.gif 500w' src='bla.gif' sizes='50vw'>", "bla4.gif", "http://example.test/", Resource::Image, 250},
+        {"http://example.test", "<img srcset='bla2.gif 100w, bla3.gif 250w, bla4.gif 500w' sizes='50vw' src='bla.gif'>", "bla4.gif", "http://example.test/", Resource::Image, 250},
+    };
+
+    for (auto testCase : testCases)
+        test(testCase);
+}
+
 TEST_F(HTMLPreloadScannerTest, testViewportNoContent)
 {
     TestCase testCases[] = {