ChangeLog

2016-07-08  Tim Horton  <timothy_horton@apple.com>

        Mail messages don't start loading until scrolling completes

        https://bugs.webkit.org/show_bug.cgi?id=159585

        <rdar://problem/27088405>

        Reviewed by NOBODY (OOPS!).

        * UIProcess/Network/CustomProtocols/mac/CustomProtocolManagerProxyMac.mm:

        (-[WKCustomProtocolLoader initWithCustomProtocolManagerProxy:customProtocolID:request:connection:]):

        When scrolling, NSDefaultRunLoopMode isn't run, but NSRunLoopCommonModes are.

        CFNetwork uses NSDefaultRunLoopMode if we tell NSURLConnection to "start immediately",

        but we can instead schedule our NSURLConnection into NSRunLoopCommonModes

        and start it ourselves, ensuring that it will be able to do work while scrolling is happening.

2016-07-08  Anders Carlsson  <andersca@apple.com>

        Fix 32-bit build.

Source/WebKit2/UIProcess/Network/CustomProtocols/mac/CustomProtocolManagerProxyMac.mm

@@using namespace WebKit;

    _storagePolicy = NSURLCacheStorageNotAllowed;

#pragma clang diagnostic push

#pragma clang diagnostic ignored "-Wdeprecated-declarations"

71 _urlConnection = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:YES];

    _urlConnection = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:NO];

    [_urlConnection scheduleInRunLoop:[NSRunLoop mainRunLoop] forMode:NSRunLoopCommonModes];

    [_urlConnection start];

#pragma clang diagnostic pop

    return self;