GN: Bug fixes in process_file_template

GN: Bug fixes in process_file_template

process_file_template would fail when the template argument was a string instead of a list, but the previous behavior (and the documentation) describes it as being able to take a string or a list as an argument.

It would also fail if the result was not an absolute file. This is required for most uses of sources expansions, but not for process_file_template which just returns the strings of whatever the results were. This adds "AsStrings" version of the sources expansions writer.

R=jamesr@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=289112

[jamesr, 2014-08-12 20:20:33]

lgtm

https://codereview.chromium.org/462103004/diff/20001/tools/gn/function_proces...
File tools/gn/function_process_file_template.cc (right):

https://codereview.chromium.org/462103004/diff/20001/tools/gn/function_proces...
tools/gn/function_process_file_template.cc:79: if (args[1].type() ==
Value::STRING) {
could you hoist args[1] into a local var of type const Value&? it'd make this
easier to read if it had a proper name imho

[brettw, 2014-08-12 23:29:11]

Committed patchset #3 manually as 289112 (presubmit successful).