Code:  bool AddInitialUrlToPreconnectPrediction(const GURL& initial_url,
                                          PreconnectPrediction* prediction) {
  GURL initial_origin = initial_url.GetOrigin();
  static const int kMinSockets = 2;

  if (!prediction->requests.empty() &&
       prediction->requests.front().origin == initial_origin) {
     prediction->requests.front().num_sockets =
         std::max(prediction->requests.front().num_sockets, kMinSockets);
  } else if (initial_origin.is_valid() &&
             initial_origin.SchemeIsHTTPOrHTTPS()) {
    url::Origin origin = url::Origin::Create(initial_origin);
    prediction->requests.emplace(prediction->requests.begin(), initial_origin,
                                 kMinSockets,
                                 net::NetworkIsolationKey(origin, origin));
   }
 
   return !prediction->requests.empty();
}

Vulnerability Type: 
CWE ID: CWE-125
Summary: Insufficient validation of untrusted input in Skia in Google Chrome prior to 59.0.3071.86 for Linux, Windows, and Mac, and 59.0.3071.92 for Android, allowed a remote attacker to perform an out of bounds memory read via a crafted HTML page.
Commit Message: Origins should be represented as url::Origin (not as GURL).

As pointed out in //docs/security/origin-vs-url.md, origins should be
represented as url::Origin (not as GURL).  This CL applies this
guideline to predictor-related code and changes the type of the
following fields from GURL to url::Origin:
- OriginRequestSummary::origin
- PreconnectedRequestStats::origin
- PreconnectRequest::origin

The old code did not depend on any non-origin parts of GURL
(like path and/or query).  Therefore, this CL has no intended
behavior change.

Bug: 973885
Change-Id: Idd14590b4834cb9d50c74ed747b595fe1a4ba357
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1895167
Commit-Queue: Łukasz Anforowicz <lukasza@chromium.org>
Reviewed-by: Alex Ilin <alexilin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#716311}