Bug 1160267 - JS build files should not declare IMPL_MFBT. r=glandium

js/src/gdb/moz.build

@@ -20,10 +20,7 @@ UNIFIED_SOURCES += [
     'tests/typedef-printers.cpp',
 ]
 
-# Building against js_static requires that we declare mfbt sybols "exported"
-# on its behalf.
-for var in ('EXPORT_JS_API', 'IMPL_MFBT'):
-    DEFINES[var] = True
+DEFINES['EXPORT_JS_API'] = True
 
 LOCAL_INCLUDES += ['..']
 GENERATED_INCLUDES += ['..']

js/src/jsapi-tests/moz.build

@@ -100,9 +100,6 @@ if CONFIG['ENABLE_ION']:
     ]
 
 DEFINES['EXPORT_JS_API'] = True
-# Building against js_static requires that we declare mfbt sybols "exported"
-# on its behalf.
-DEFINES['IMPL_MFBT'] = True
 
 LOCAL_INCLUDES += ['..']
 GENERATED_INCLUDES += ['..']

js/src/shell/moz.build

@@ -16,10 +16,7 @@ UNIFIED_SOURCES += [
     'OSObject.cpp'
 ]
 
-# Building against js_static requires that we declare mfbt sybols "exported"
-# on its behalf.
-for var in ('EXPORT_JS_API', 'IMPL_MFBT'):
-    DEFINES[var] = True
+DEFINES['EXPORT_JS_API'] = True
 
 if CONFIG['_MSC_VER']:
     # unnecessary PGO for js shell.  But gcc cannot turn off pgo because it is