Enable features API for content shell and webview

When I run the following:

build/android/adb_content_shell_command_line --enable-features=ImeThread

Then call to base::FeatureList::IsEnabled(features::kImeThread)
always returns false.

This happens because we are not initializing feature list for content shell.

With this CL, BrowserMainLoop::PreCreateThreads() now initializes
features from
commandline.

BUG=596021

Review URL: https://codereview.chromium.org/1812883003

Cr-Commit-Position: refs/heads/master@{#384212}


CrOS-Libchrome-Original-Commit: 5b9da199ca3d2cc6e4bc25861df705f6e3151c04
3 files changed
tree: 91bd8a6232f1d938a9cdb71c2fcc436233af560b
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/