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This creates the lib build file, adds any missing dependencies, and
moves a crashpad dependency that that was incorrectly placed in the old
lib rule.

Test: gn check out/aw 'android_webview/*'
Bug: 934152
Change-Id: Ic9a03e5a8f105364f9c61e08b35a5889cabfea3f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1880070Reviewed-by: Nate Fischer <ntfschr@chromium.org>
Reviewed-by: Richard Coles <torne@chromium.org>
Reviewed-by: Eric Stevenson <estevenson@chromium.org>
Commit-Queue: Robbie McElrath <rmcelrath@chromium.org>
Cr-Commit-Position: refs/heads/master@{#710053}