Clear cache before running the test

third_party/WebKit/LayoutTests/http/tests/inspector/network/network-filters.html

Index: third_party/WebKit/LayoutTests/http/tests/inspector/network/network-filters.html
diff --git a/third_party/WebKit/LayoutTests/http/tests/inspector/network/network-filters.html b/third_party/WebKit/LayoutTests/http/tests/inspector/network/network-filters.html
index 2dba1356fa5aadc96ec87c954e586e50d936b270..85050936075c502c492bcb30dadcf2a657c981b4 100644
--- a/third_party/WebKit/LayoutTests/http/tests/inspector/network/network-filters.html
+++ b/third_party/WebKit/LayoutTests/http/tests/inspector/network/network-filters.html
@@ -5,16 +5,6 @@
 <script>
 function test()
 {
-    InspectorTest.recordNetwork();
-
-    var totalResourceCount = 4;
-    InspectorTest.makeFetch("resources/style.css", {}, ensureAllResources);
-    InspectorTest.makeFetch("resources/abe.png", {}, () => {
-        // Ensures result is cached.
-        InspectorTest.makeFetch("resources/abe.png", {}, ensureAllResources);
-        ensureAllResources();
-    });
-    InspectorTest.makeFetch("missing/foo.bar", {}, ensureAllResources);
     var filterChecks = [{
         filterText: "-.css",
         isRegex: false
@@ -94,6 +84,18 @@ function test()
         UI.panels.network._networkLogView._textFilterUI.setValue(value);
         UI.panels.network._networkLogView._filterChanged(null); // event not used in this method, so passing null
     }
+
+    InspectorTest.clearAllCaches();

[pfeldman, 2016/12/15 18:25:08]

Why do you think Cache API is related to the flakiness?

+    InspectorTest.recordNetwork();
+
+    var totalResourceCount = 4;
+    InspectorTest.makeFetch("resources/style.css", {}, ensureAllResources);
+    InspectorTest.makeFetch("resources/abe.png", {}, () => {
+        // Ensures result is cached.
+        InspectorTest.makeFetch("resources/abe.png", {}, ensureAllResources);
+        ensureAllResources();
+    });
+    InspectorTest.makeFetch("missing/foo.bar", {}, ensureAllResources);
 }
 </script>
 </head>