Move winhttp.dll to be delay load for chrome.exe.

This dependency was added when crashpad fallback handler was added
to chrome.exe, but this dependency should be delay load as it's
only used when uploading a crash report.

BUG=870463

Change-Id: I180fd151f9d0c79c850fe818b87138b311066cc1
Reviewed-on: https://chromium-review.googlesource.com/1160797Reviewed-by: Nico Weber <thakis@chromium.org>
Reviewed-by: Bruce Dawson <brucedawson@chromium.org>
Commit-Queue: Will Harris <wfh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#581341}

chrome/BUILD.gn

@@ -232,6 +232,7 @@ if (!is_android && !is_mac) {
           "/DELAYLOAD:uxtheme.dll",
           "/DELAYLOAD:ole32.dll",
           "/DELAYLOAD:oleaut32.dll",
+          "/DELAYLOAD:winhttp.dll",
         ]
 
         if (current_cpu == "x64") {