Fixed image-sizes-js-change flakiness

Switched from using dumpResourceRequestCallbacks to using direct
memoryCache APIs in internals.

BUG=426041

Review URL: https://codereview.chromium.org/675853003

git-svn-id: svn://svn.chromium.org/blink/trunk@184348 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/LayoutTests/TestExpectations

@@ -1477,8 +1477,6 @@ crbug.com/426543 fast/js/mozilla/strict/15.4.4.13.html [ Pass Failure ]
 
 crbug.com/425537 fast/notifications/notifications-constructor-request-permission.html [ Skip ]
 
-crbug.com/426041 fast/dom/HTMLImageElement/image-sizes-js-change.html [ Pass Failure ]
-
 crbug.com/401377 [ Win Release ] http/tests/serviceworker/fetch-mixed-content.html [ Pass Timeout ]
 
 crbug.com/426078 [ Win7 ] http/tests/security/img-crossorigin-no-credentials-prompt.html [ Pass Timeout ]

third_party/WebKit/LayoutTests/fast/dom/HTMLImageElement/image-sizes-js-change-expected.txt

-main frame - img requested 'image-set-4x.png'
 PASS successfullyParsed is true
 
 TEST COMPLETE
 PASS currentSrcFileName("foo") is "image-set-4x.png"
+PASS internals.isLoadingFromMemoryCache("resources/image-set-4x.png") is true
+PASS internals.isLoadingFromMemoryCache("../../hidpi/resources/image-set-2x.png") is false
+PASS internals.isLoadingFromMemoryCache("../../hidpi/resources/image-set-1x.png") is false
+PASS internals.isLoadingFromMemoryCache("resources/blue-100-px-square.png") is false
 

third_party/WebKit/LayoutTests/fast/dom/HTMLImageElement/image-sizes-js-change.html

@@ -5,6 +5,9 @@
 <script>
     if (window.testRunner)
         testRunner.dumpAsText();
+    
+    if (internals)
+        internals.evictAllResources();
 
     function updateSrc() {
         var img = document.getElementById("foo");
@@ -16,12 +19,16 @@
     }
 
     addEventListener("DOMContentLoaded", function() {
-        if (window.testRunner && sessionStorage.pageReloaded)
-            testRunner.dumpResourceRequestCallbacks();
         updateSrc();
     }, false);
     addEventListener("load", function() {
         shouldBe('currentSrcFileName("foo")', '"image-set-4x.png"');
+        if (internals) {
+            shouldBeTrue('internals.isLoadingFromMemoryCache("resources/image-set-4x.png")');
+            shouldBeFalse('internals.isLoadingFromMemoryCache("../../hidpi/resources/image-set-2x.png")');
+            shouldBeFalse('internals.isLoadingFromMemoryCache("../../hidpi/resources/image-set-1x.png")');
+            shouldBeFalse('internals.isLoadingFromMemoryCache("resources/blue-100-px-square.png")');
+        }
     }, false);
 </script>
 <img id="foo">