Post a microtask to load <img> elements.

LayoutTests/http/tests/security/isolatedWorld/bypass-main-world-csp-expected.txt

Index: LayoutTests/http/tests/security/isolatedWorld/bypass-main-world-csp-expected.txt
diff --git a/LayoutTests/http/tests/security/isolatedWorld/bypass-main-world-csp-expected.txt b/LayoutTests/http/tests/security/isolatedWorld/bypass-main-world-csp-expected.txt
index ae64a7db9748805074c9e2664e376c94dd01c8be..e25281a14b39d1cb683168780a8b71b7c4b8ccf3 100644
--- a/LayoutTests/http/tests/security/isolatedWorld/bypass-main-world-csp-expected.txt
+++ b/LayoutTests/http/tests/security/isolatedWorld/bypass-main-world-csp-expected.txt
@@ -1,14 +1,30 @@
-CONSOLE ERROR: Refused to load the image 'http://127.0.0.1:8000/security/resources/abe.png' because it violates the following Content Security Policy directive: "img-src 'none'".
+ALERT: Running test #6
 
-ALERT: BLOCKED in main world
-CONSOLE ERROR: Refused to load the image 'http://127.0.0.1:8000/security/resources/abe.png' because it violates the following Content Security Policy directive: "img-src 'none'".
+CONSOLE ERROR: Refused to load the image 'http://127.0.0.1:8000/security/resources/abe.png?6' because it violates the following Content Security Policy directive: "img-src 'none'".
+
+ALERT: BLOCKED
+ALERT: Running test #5
+
+CONSOLE ERROR: Refused to load the image 'http://127.0.0.1:8000/security/resources/abe.png?5' because it violates the following Content Security Policy directive: "img-src 'none'".
+
+ALERT: BLOCKED
+ALERT: Running test #4
 
-ALERT: BLOCKED in isolated world
 ALERT: Starting to bypass main world's CSP:
-ALERT: LOADED in isolated world
-CONSOLE ERROR: Refused to load the image 'http://127.0.0.1:8000/security/resources/abe.png' because it violates the following Content Security Policy directive: "img-src 'none'".
+ALERT: LOADED
+ALERT: Running test #3
+
+ALERT: LOADED
+ALERT: Running test #2
+
+CONSOLE ERROR: Refused to load the image 'http://127.0.0.1:8000/security/resources/abe.png?2' because it violates the following Content Security Policy directive: "img-src 'none'".
+
+ALERT: BLOCKED
+ALERT: Running test #1
 
-ALERT: BLOCKED in main world
-This test ensures that scripts run in isolated worlds marked with their own Content Security Policy aren't affected by the page's content security policy. Extensions, for example, should be able to load any resource they like.
+CONSOLE ERROR: Refused to load the image 'http://127.0.0.1:8000/security/resources/abe.png?1' because it violates the following Content Security Policy directive: "img-src 'none'".
 
+ALERT: BLOCKED
+ALERT: Running test #0
 
+ This test ensures that scripts run in isolated worlds marked with their own Content Security Policy aren't affected by the page's content security policy. Extensions, for example, should be able to load any resource they like.