Implement chrome.brailleDisplayPrivate API

chrome/chrome_browser_extensions.gypi

Index: chrome/chrome_browser_extensions.gypi
diff --git a/chrome/chrome_browser_extensions.gypi b/chrome/chrome_browser_extensions.gypi
index f746ea952dc832218e0abb0e312416e815e6906d..0980ba229d613ba8db6a625f7f84566942744ae0 100644
--- a/chrome/chrome_browser_extensions.gypi
+++ b/chrome/chrome_browser_extensions.gypi
@@ -7,7 +7,17 @@
     {
       'target_name': 'browser_extensions',
       'type': 'static_library',
-      'variables': { 'enable_wexit_time_destructors': 1, },
+      'variables': {
+        'enable_wexit_time_destructors': 1,
+        'use_brlapi%': 0,
+        'conditions': [
+          [ 'chromeos==1', {
+            'use_brlapi%': 1,
+          }, {
+            'use_brlapi%': 1,
+          }],
+        ],
+      },
       # Since browser and browser_extensions actually depend on each other,
       # we must omit the dependency from browser_extensions to browser.
       # However, this means browser_extensions and browser should more or less
@@ -134,6 +144,9 @@
         'browser/extensions/api/bookmarks/bookmark_api_helpers.h',
         'browser/extensions/api/bookmarks/bookmarks_api.cc',
         'browser/extensions/api/bookmarks/bookmarks_api.h',
+        'browser/extensions/api/braille_display_private/braille_controller_brlapi.cc',
+        'browser/extensions/api/braille_display_private/braille_controller_stub.cc',
+        'browser/extensions/api/braille_display_private/braille_controller.h',
         'browser/extensions/api/braille_display_private/braille_display_private_api.h',
         'browser/extensions/api/braille_display_private/braille_display_private_api.cc',
         'browser/extensions/api/browsing_data/browsing_data_api.cc',
@@ -1027,6 +1040,18 @@
             '../webkit/support/webkit_support.gyp:glue',
           ],
         }],
+        ['use_brlapi==1', {
+          'sources!': [
+            'browser/extensions/api/braille_display_private/braille_controller_stub.cc',
+          ],
+          'dependencies' : [
+            '../build/linux/system.gyp:libbrlapi',
+          ],
+        }, {  # use_brlapi==0
+          'sources!': [
+            'browser/extensions/api/braille_display_private/braille_controller_brlapi.cc',
+          ],
+        }],
       ],
     },
   ],