Add enable_automation build switch.

It's only disabled on Android to exclude automation from Android build.
enable_automation=0 still doesn't work on platforms other than Android.

BUG=117407
TEST=none


Review URL: http://codereview.chromium.org/9696049

git-svn-id: http://src.chromium.org/svn/trunk/src/build@127004 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

all.gyp

@@ -272,7 +272,7 @@
       'conditions': [
         # If you change this condition, make sure you also change it
         # in chrome_tests.gypi
-        ['OS=="mac" or OS=="win" or (os_posix==1 and OS != "android" and target_arch==python_arch)', {
+        ['enable_automation==1 and (OS=="mac" or OS=="win" or (os_posix==1 and target_arch==python_arch))', {
           'dependencies': [
             '../chrome/chrome.gyp:pyautolib',
           ],

common.gypi

@@ -429,6 +429,13 @@
         }, {
           'linux_use_gold_flags%': 0,
         }],
+
+        # Enable automation on platforms other than Android.
+        ['OS=="android"', {
+          'enable_automation%': 0,
+        }, {
+          'enable_automation%': 1,
+        }],
       ],
     },
 
@@ -495,6 +502,7 @@
     'linux_use_gold_flags%': '<(linux_use_gold_flags)',
     'use_canvas_skia_skia%': '<(use_canvas_skia_skia)',
     'tests_run%': '<(tests_run)',
+    'enable_automation%': '<(enable_automation)',
 
     # Whether to build for Wayland display server
     'use_wayland%': 0,
@@ -1359,6 +1367,9 @@
       ['enable_themes==1', {
         'defines': ['ENABLE_THEMES=1'],
       }],
+      ['enable_automation==1', {
+        'defines': ['ENABLE_AUTOMATION=1'],
+      }],
     ],  # conditions for 'target_defaults'
     'target_conditions': [
       ['enable_wexit_time_destructors==1', {