Add support to override output_all_resource_defines from command line.

grit/node/misc.py

Index: grit/node/misc.py
diff --git a/grit/node/misc.py b/grit/node/misc.py
index 9a23263d6074077908a49816008c12ccceea35e2..64c469063dc8980f969ee09ecdcfc891e0e43052 100755
--- a/grit/node/misc.py
+++ b/grit/node/misc.py
@@ -292,6 +292,11 @@ class GritNode(base.Node):
     """
     return self.attrs['base_dir']
 
+  def SetShouldOutputAllResourceDefines(self, value):
+    """Overrides the value of output_all_resource_defines found in the grd file.
+    """
+    self.attrs['output_all_resource_defines'] = 'true' if value else 'false'
+
   def ShouldOutputAllResourceDefines(self):
     """Returns true if all resource defines should be output, false if
     defines for resources not emitted to resource files should be