linux_aura: Compile ash into chrome.

[This is take three. I believe that I've now fixed all the static
initializers (including both files named debug_utils.cc that were
including <iostream>), the packaging failures, and the black border
on the app list as pointed out by mgiuca@.]

Running chrome with the "--open-ash" parameter will create an ash
desktop window. Ash on Linux has some problems, but at least we're now
compiling the code into the binary.

TODO: The applist isn't positioned correctly, and some details of the
system tray aren't correct.

BUG=300084, 303862
TBR=sky@chromium.org
First Review URL: https://codereview.chromium.org/25108005

Review URL: https://codereview.chromium.org/292443002

git-svn-id: http://src.chromium.org/svn/trunk/src/build@271725 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

common.gypi

@@ -87,7 +87,7 @@
 
           'conditions': [
             # ChromeOS and Windows use Aura and Ash.
-            ['chromeos==1 or OS=="win"', {
+            ['chromeos==1 or OS=="win" or OS=="linux"', {
               'use_ash%': 1,
               'use_aura%': 1,
             }],
@@ -97,14 +97,6 @@
               'use_aura%': 1,
             }],
 
-            # ToT Linux should be aura.
-            #
-            # TODO(erg): Merge this into the previous block once compiling with
-            # aura safely implies including ash capabilities.
-            ['OS=="linux"', {
-              'use_aura%': 1,
-            }],
-
             # Whether we're a traditional desktop unix.
             ['(OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris") and chromeos==0', {
               'desktop_linux%': 1,