Provide defines as local variables in if-expressions.

grit/format/resource_map_unittest.py

Index: grit/format/resource_map_unittest.py
diff --git a/grit/format/resource_map_unittest.py b/grit/format/resource_map_unittest.py
index 6112e03015026bd4bf81eae0081e45bc03833b48..8f162b5087e8371410c4ce0927c277e90375c11c 100644
--- a/grit/format/resource_map_unittest.py
+++ b/grit/format/resource_map_unittest.py
@@ -109,13 +109,13 @@ const size_t kTheRcHeaderSize = arraysize(kTheRcHeader);''', output)
             <message name="IDS_PRODUCT_NAME" desc="The application name">
               Application
             </message>
-            <if expr="1">
+            <if expr="True">

[newt (away), 2014/02/07 17:33:42]

This test was failing since I added an assert that if-expressions must evaluate
to a boolean. Rationale: expr="chromium_build" should fail if chromium_build is
a string, e.g. "chromium" or "chrome"... in which case implicit conversion to a
boolean is probably not what the user intended.

               <message name="IDS_DEFAULT_TAB_TITLE_TITLE_CASE"
                   desc="In Title Case: The default title in a tab.">
                 New Tab
               </message>
             </if>
-            <if expr="0">
+            <if expr="False">
               <message name="IDS_DEFAULT_TAB_TITLE"
                   desc="The default title in a tab.">
                 New tab