Regression(r220817): We should only copy the original request headers for Ping loads

Regression(r220817): We should only copy the original request headers for Ping loads
https://bugs.webkit.org/show_bug.cgi?id=175679

Reviewed by Youenn Fablet.

Source/WebCore:

For performance reason, we should only copy the original request headers for Ping loads
(Beacon at the moment), not for all CachedResourceRequests.

* loader/LoaderStrategy.h:
* loader/cache/CachedResource.cpp:
(WebCore::CachedResource::CachedResource):
(WebCore::CachedResource::load):
* loader/cache/CachedResource.h:
(WebCore::CachedResource::shouldUsePingLoad):
(WebCore::CachedResource::setOriginalRequestHeaders):
* loader/cache/CachedResourceLoader.cpp:
(WebCore::CachedResourceLoader::requestResource):
* loader/cache/CachedResourceRequest.cpp:
(WebCore::CachedResourceRequest::CachedResourceRequest):
* loader/cache/CachedResourceRequest.h:
(WebCore::CachedResourceRequest::releaseResourceRequest):
(WebCore::CachedResourceRequest::releaseOriginalRequestHeaders): Deleted.

Source/WebKit:

For performance reason, we should only copy the original request headers for Ping loads
(Beacon at the moment), not for all CachedResourceRequests.

* NetworkProcess/NetworkConnectionToWebProcess.cpp:
(WebKit::NetworkConnectionToWebProcess::loadPing):
* NetworkProcess/NetworkConnectionToWebProcess.h:
* NetworkProcess/NetworkConnectionToWebProcess.messages.in:
* NetworkProcess/NetworkResourceLoadParameters.cpp:
(WebKit::NetworkResourceLoadParameters::encode const):
(WebKit::NetworkResourceLoadParameters::decode):
* NetworkProcess/NetworkResourceLoadParameters.h:
* NetworkProcess/PingLoad.cpp:
(WebKit::PingLoad::PingLoad):
(WebKit::PingLoad::willPerformHTTPRedirection):
(WebKit::PingLoad::makeCrossOriginAccessRequest):
(WebKit::PingLoad::makeSimpleCrossOriginAccessRequest):
(WebKit::PingLoad::originalRequestHeaders const): Deleted.
* NetworkProcess/PingLoad.h:
* WebProcess/Network/WebLoaderStrategy.cpp:
(WebKit::WebLoaderStrategy::createPingHandle):
* WebProcess/Network/WebLoaderStrategy.h:

Source/WebKitLegacy:

* WebCoreSupport/WebResourceLoadScheduler.cpp:
(WebResourceLoadScheduler::createPingHandle):
* WebCoreSupport/WebResourceLoadScheduler.h:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@220888 268f45cc-cd09-0410-ab3c-d52691b4dbfc