Consolidate Xcode Project Setup

1. Remove 'sources.xcodeproj'
2. Add a 'sources' target under products project for files indexing.
3. Delete xctests/ folder to fix duplicate xctest file copies.

BUG=679110

Review-Url: https://codereview.chromium.org/2623203004
Cr-Original-Commit-Position: refs/heads/master@{#444469}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: de19976ca12bb4c42acd5bfb5a83a69047d6e7b4
3 files changed
tree: 3e7ca8d68c15657e3287bd34a465d6a83e9b52ee
  1. tools/