[ServiceWorker] Fetch event should return integrity value

content/child/web_url_request_util.cc

Index: content/child/web_url_request_util.cc
diff --git a/content/child/web_url_request_util.cc b/content/child/web_url_request_util.cc
index d19aef22b2c005829357c7c40090f5519beb9fdd..fbc1c4b9fde23fe0b57699ecc55b4a0622251fd1 100644
--- a/content/child/web_url_request_util.cc
+++ b/content/child/web_url_request_util.cc
@@ -381,6 +381,11 @@ FetchRedirectMode GetFetchRedirectModeForWebURLRequest(
   return static_cast<FetchRedirectMode>(request.GetFetchRedirectMode());
 }
 
+std::string GetFetchIntegrityForWebURLRequest(
+    const blink::WebURLRequest& request) {
+  return request.GetFetchIntegrity().Utf8();

[falken, 2017/07/07 00:56:11]

yhirano: just want to double check, is this the right way to handle a DOMString?
We can safely do Utf8? I vaguely remember problems converting strings before
from Blink to std::string.

[yhirano, 2017/07/12 06:14:15]

From WebString.h:

// Note that if you need to convert the UTF8 string converted from WebString
// back to WebString with fromUTF8() you may want to specify Strict
// UTF8ConversionMode when you call utf8(), as fromUTF8 rejects strings
// with invalid UTF8 characters.        

+}
+
 STATIC_ASSERT_ENUM(REQUEST_CONTEXT_FRAME_TYPE_AUXILIARY,
                    WebURLRequest::kFrameTypeAuxiliary);
 STATIC_ASSERT_ENUM(REQUEST_CONTEXT_FRAME_TYPE_NESTED,