base: Remove the string logging from CHECK().

base/test/test_support_ios.mm

Index: base/test/test_support_ios.mm
diff --git a/base/test/test_support_ios.mm b/base/test/test_support_ios.mm
index 2509fa0e7307b078d7df913351fea1ce1995faf2..b606f4c7a2dc67edc755328f0ce8e896dccda24e 100644
--- a/base/test/test_support_ios.mm
+++ b/base/test/test_support_ios.mm
@@ -111,7 +111,8 @@ static char** g_argv;
       NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
                                           NSUserDomainMask,
                                           YES);
-  CHECK([searchPath count] > 0) << "Failed to get the Documents folder";
+  // Failed to get the Documents folder
+  CHECK([searchPath count] > 0);
   return [searchPath objectAtIndex:0];
 }