Add tests for webRequest events and frame unload

chrome/browser/extensions/api/web_request/web_request_apitest.cc

Index: chrome/browser/extensions/api/web_request/web_request_apitest.cc
diff --git a/chrome/browser/extensions/api/web_request/web_request_apitest.cc b/chrome/browser/extensions/api/web_request/web_request_apitest.cc
index 82727fcb3a39373c2d7b9c73024e6703bc83257d..b95022886d5af8a092e4cf2da12ef0d5a90e349f 100644
--- a/chrome/browser/extensions/api/web_request/web_request_apitest.cc
+++ b/chrome/browser/extensions/api/web_request/web_request_apitest.cc
@@ -159,6 +159,32 @@ IN_PROC_BROWSER_TEST_F(ExtensionWebRequestApiTest, WebRequestTypes) {
   ASSERT_TRUE(RunExtensionSubtest("webrequest", "test_types.html")) << message_;
 }
 
+// Tests what happens when a frame/tab is removed while a response is being
+// received.

[battre, 2016/05/23 11:17:07]

Rephrase this to "Test that ... happens"?

[robwu, 2016/05/23 11:51:03]

Done.

+IN_PROC_BROWSER_TEST_F(ExtensionWebRequestApiTest,
+                       WebRequestUnloadAfterRequest) {
+  ASSERT_TRUE(StartEmbeddedTestServer());
+  ASSERT_TRUE(RunExtensionSubtest("webrequest", "test_unload.html?1")) <<
+      message_;
+  ASSERT_TRUE(RunExtensionSubtest("webrequest", "test_unload.html?2")) <<
+      message_;
+  ASSERT_TRUE(RunExtensionSubtest("webrequest", "test_unload.html?3")) <<
+      message_;
+  ASSERT_TRUE(RunExtensionSubtest("webrequest", "test_unload.html?4")) <<
+      message_;
+}
+
+// Tests what happens when a frame/tab is removed immediately after issuing a
+// request.

[battre, 2016/05/23 11:17:07]

Ditto.

[robwu, 2016/05/23 11:51:03]

Done.

+IN_PROC_BROWSER_TEST_F(ExtensionWebRequestApiTest,
+                       WebRequestUnloadImmediately) {
+  ASSERT_TRUE(StartEmbeddedTestServer());
+  ASSERT_TRUE(RunExtensionSubtest("webrequest", "test_unload.html?5")) <<
+      message_;
+  ASSERT_TRUE(RunExtensionSubtest("webrequest", "test_unload.html?6")) <<
+      message_;
+}
+
 // Flaky (sometimes crash): http://crbug.com/140976
 IN_PROC_BROWSER_TEST_F(ExtensionWebRequestApiTest,
                        DISABLED_WebRequestAuthRequired) {