AU: generate a delta payload usage report

AU: generate a delta payload usage report

Currently, the report is generated as part of delta payload generation.
Here's a sample of the top of the report:

  1.06%    1104147 BSDIFF     /opt/google/o3d/libnpo3dautoplugin.so
  1.53%    1596334 REPLACE_BZ /usr/share/fonts/droid-cros/DroidSansFallback.ttf
  1.92%    2004371 BSDIFF     /opt/google/chrome/libpdf.so
  2.22%    2317201 BSDIFF     /usr/sbin/chromeos-firmwareupdate
  3.01%    3138556 REPLACE_BZ <kernel-operation-0>
  3.01%    3139632 REPLACE    /boot/vmlinuz-2.6.32.21+drm33.7
  7.48%    7801907 REPLACE_BZ <rootfs-final-operation>
 15.61%   16281170 BSDIFF     /opt/google/chrome/chrome
 28.19%   29391876 BSDIFF     /usr/libexec/ibus-engine-mozc
100.00%  104276861            <total>

BUG=7266
TEST=generated a delta payload and looked at the report

Change-Id: I9f32f000260469cc15fd8e0f9b55a8aa10db0cd9

Committed: http://chrome-svn/viewvc/chromeos?view=rev&revision=880335c

[petkov, 2010-10-01 22:03:03]

Take a look. I guess it could be cleaner, maybe a separate file/class, etc...
Open to suggestions :-)

[adlr, 2010-10-01 22:34:19]

LGTM

http://codereview.chromium.org/3526012/diff/1/2
File delta_diff_generator.cc (right):

http://codereview.chromium.org/3526012/diff/1/2#newcode476
delta_diff_generator.cc:476: DeltaObject(const string& in_name, const int
in_type, const size_t in_size)
i think generally we use off_t for filesize, which is guaranteed to be 64bit.

[petkov, 2010-10-01 22:52:01]

pushing...

http://codereview.chromium.org/3526012/diff/1/2
File delta_diff_generator.cc (right):

http://codereview.chromium.org/3526012/diff/1/2#newcode476
delta_diff_generator.cc:476: DeltaObject(const string& in_name, const int
in_type, const size_t in_size)
On 2010/10/01 22:34:19, adlr wrote:
> i think generally we use off_t for filesize, which is guaranteed to be 64bit. 

Done.