Split GCMDriver into platform-specific implementations

components/gcm.gypi

Index: components/gcm.gypi
diff --git a/components/gcm.gypi b/components/gcm.gypi
index 054bdcc7f2678cf718745fb5dc84a397876d497b..a679a894f18cdfd571eb2ff9e384bfa36b565e65 100644
--- a/components/gcm.gypi
+++ b/components/gcm.gypi
@@ -23,6 +23,18 @@
         'gcm/gcm_client_factory.h',
         'gcm/gcm_driver.cc',
         'gcm/gcm_driver.h',
+        'gcm/gcm_driver_android.cc',
+        'gcm/gcm_driver_android.h',

[fgorski, 2014/05/07 18:50:14]

Would this compile the gcm_driver_android on desktop as well? If so, do we need
it?

[johnme, 2014/05/08 16:08:02]

No, *_android.* is only compiled on Android. See [1] (needs updating to mention
_android, but the same mechanism does work on Android). For gcm_driver_desktop,
I wasn't able to use that mechanism, so I used the preferred alternative
mechanism listed below on that page, which is to list it but then exclude it.

[1]:
https://code.google.com/p/gyp/wiki/GypUserDocumentation#Add_a_platform-specif...

+        'gcm/gcm_driver_desktop.cc',
+        'gcm/gcm_driver_desktop.h',
+      ],
+      'conditions': [
+        ['OS=="android"', {
+          'sources!': [
+            'gcm_client_desktop.cc',
+            'gcm_client_desktop.h',
+          ],
+        }],
       ],
     },
     {