Make resource directory option in gyp template optional.

build/java_apk.gypi

Index: build/java_apk.gypi
diff --git a/build/java_apk.gypi b/build/java_apk.gypi
index 0973f8dbba2df85dccbc0c2f5e9f70afcf43891c..0181a16784e61a1db322d4affda6fa796aad2d73 100644
--- a/build/java_apk.gypi
+++ b/build/java_apk.gypi
@@ -66,6 +66,7 @@
     'proguard_flags%': '',
     'native_libs_paths': [],
     'manifest_package_name%': 'unknown.package.name',
+    'resource_dir%':'',
   },
   'sources': [
       '<@(native_libs_paths)'
@@ -106,11 +107,16 @@
         # If there is a separate find for additional_src_dirs, it will find the
         # wrong .java files when additional_src_dirs is empty.
         '>!@(find >(java_in_dir) >(additional_src_dirs) -name "*.java")',
-        '<!@(find <(java_in_dir)/<(resource_dir) -name "*")',
         '>@(input_jars_paths)',
         '>@(native_libs_paths)',
         '>@(additional_input_paths)',
       ],
+      'conditions': [
+        ['"<(resource_dir)"!=""', {
+          'inputs': ['<!@(find <(java_in_dir)/<(resource_dir) -name "*")']

[cjhopman, 2012/10/16 20:27:12]

Nit: indentation

+          },
+        ]
+      ],
       'outputs': [
         # TODO(cjhopman): Apks are built with a -debug suffix even when they are
         # built in release. This should be fixed.