Add whitelist support for grit repack steps.

-Adds new repack_options variables
-Updates pragma to output numeric_id instead of resource_id
-Updates find_used_resources.py to filter for numeric_id

To use the existing system you need to do following steps:
1. Remove out directory (we need to do a clean build)
2. Append " enable_resource_whitelist_generation=1" to GYP_DEFINES
3. Run gyp
4. Build your target (e.g. chrome_shell_apk) saving output to a file
   (e.g. build.txt)
5. cat build.txt | tools/resources/find_used_resources.py > whitelist.txt
6. Append " repack_options='--whitelist /path/to/whitelist.txt'"
7. Run gyp
8. Build your target again.
9. ???
10. Profit!!!

BUG=338759

Review URL: https://codereview.chromium.org/216233012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@261611 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 3 insertions, 2 deletions

diff --git a/tools/resources/find_used_resources.py b/tools/resources/find_used_resources.py
index 60af3e5..3fc3bce 100755
--- a/tools/resources/find_used_resources.py
+++ b/tools/resources/find_used_resources.py
@@ -18,7 +18,8 @@ script parses out the list of used resource ids. These resource ids show up in
 the build output after building Chrome with gyp variable
 enable_resource_whitelist_generation set to 1. This gyp flag causes the compiler
 to print out a UnknownPragma message every time a resource id is used. E.g.:
-foo.cc:22:0: warning: ignoring #pragma IDS_FOO_BAR  [-Wunknown-pragmas]
+foo.cc:22:0: warning: ignoring #pragma whitelisted_resource_12345
+[-Wunknown-pragmas]
 
 """
 
@@ -29,7 +30,7 @@ def GetResourceIdsInPragmaWarnings(input):
   """
   used_resources = set()
   unknown_pragma_warning_pattern = re.compile('warning: ignoring #pragma '
-      '(?P<resource_id>[A-Z0-9_]*)  \[-Wunknown-pragmas\]')
+      'whitelisted_resource_(?P<resource_id>[0-9]*)  \[-Wunknown-pragmas\]')
   for ln in input:
     match = unknown_pragma_warning_pattern.search(ln)
     if match: