[Devtools] Added "is:from-cache" filter to network

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 dcc93600ae67dc26a391a0d8fff03885e46b8ec8..71805962693c3dc39bdfe93fc56f105008160c23 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
@@ -9,8 +9,11 @@ function test()
 
     var totalResourceCount = 4;
     InspectorTest.makeFetch("resources/style.css", {}, ensureAllResources);
-    InspectorTest.makeFetch("resources/abe.png", {}, ensureAllResources);
-    InspectorTest.makeFetch("resources/abe.png", {}, 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",
@@ -45,6 +48,12 @@ function test()
     }, {
         filterText: "-missing",
         isRegex: false
+    }, {
+        filterText: "is:from-cache",
+        isRegex: false
+    }, {
+        filterText: "-is:from-cache",
+        isRegex: false
     }];
 
     var resourceCount = 0;