Revert of Temporarily suppress Android API deprecation warnings.

build/android/gyp/javac.py

Index: build/android/gyp/javac.py
diff --git a/build/android/gyp/javac.py b/build/android/gyp/javac.py
index b0ef7fdfd8fb7e701e7a5d933ebe1735b136bb0c..6a3024be33b4305832eed0a4d602f8f4becef499 100755
--- a/build/android/gyp/javac.py
+++ b/build/android/gyp/javac.py
@@ -77,11 +77,7 @@
       '-classpath', ':'.join(classpath),
       '-d', classes_dir]
   if chromium_code:
-    javac_args.extend(['-Xlint:unchecked'])
-    # TODO(aurimas): re-enable this after the L SDK is launched and make
-    # everyone fix new deprecation warnings correctly.
-    # http://crbug.com/405174,398669,411361,411366,411367,411376,416041
-    # '-Xlint:deprecation'
+    javac_args.extend(['-Xlint:unchecked', '-Xlint:deprecation'])
   else:
     # XDignore.symbol.file makes javac compile against rt.jar instead of
     # ct.sym. This means that using a java internal package/class will not
@@ -264,3 +260,5 @@
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))
+
+