Port video_decode_accelerator_unittest to GN for Android

content/content_tests.gypi

Index: content/content_tests.gypi
diff --git a/content/content_tests.gypi b/content/content_tests.gypi
index 7a72fdbece5476b20f2c704b0cab80cca3c77966..b9771139dff21613d26dd165c2836639d1eac411 100644
--- a/content/content_tests.gypi
+++ b/content/content_tests.gypi
@@ -1655,6 +1655,8 @@
     ['chromeos==1 or OS=="win" or OS=="android"', {
       'targets': [
           {
+            # TODO(GN): Port Windows and ChromeOS logic.

[brettw, 2015/11/20 22:04:18]

Can you delete this TODO comment? We've been standardizing on TODO(GYP) in the
GN files (which it looks like you added) as the thing to grep for.

+            # GN: //content/test:video_decode_accelerator_unittest
             'target_name': 'video_decode_accelerator_unittest',
             'type': '<(gtest_target_type)',
             'dependencies': [
@@ -2054,7 +2056,7 @@
           'includes': [ '../build/jni_generator.gypi' ],
         },
         {
-          # TODO(GN)
+          # GN: //content/test:video_decode_accelerator_unittest_apk
           'target_name': 'video_decode_accelerator_unittest_apk',
           'type': 'none',
           'dependencies': [