Expose WebDataConsumerHandleImpl constructor to blink

This will be needed to implement fetch API preloading support.

Bug: 652228
Change-Id: Icc7719a137731552cce5613fe006097d657af7ef
Reviewed-on: https://chromium-review.googlesource.com/544377
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Yutaka Hirano <yhirano@chromium.org>
Cr-Commit-Position: refs/heads/master@{#481856}
3 files changed