Moves creation of various clients to DesktopNativeWidgetAura

We had a lot of duplication between the two DesktopRootWindowHost
implementations. This consolidates the code.

BUG=none
TEST=none

Review URL: https://codereview.chromium.org/31043006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230704 0039d316-1c4b-4281-b951-d872f2087c98
Fix enable_webrtc=0 build.

BUG=none

Review URL: https://codereview.chromium.org/39863002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230705 0039d316-1c4b-4281-b951-d872f2087c98
Remove process_dumps_linux.py

It was used by the now deleted chromebot, and is not useful without it

BUG=none
R=bauerb@chromium.org

Review URL: https://codereview.chromium.org/40103003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230706 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230706
Extract JavascriptPolicyHandler into its own file.

BUG=271392
R=joaodasilva@chromium.org

Review URL: https://codereview.chromium.org/31063003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230707 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230707