Fix two truncation bugs in harfbuzz-indic shaper.

This bugs in isMark and isLetter lead 'init' feature to be applied
even when a syllable is not at the beginning of a word.

See http://www.microsoft.com/typography/otfntdev/bengalot/features.htm
for 'init' feature application in Bengali.

It turned out that the upstream also fixed this (see https://bugs.freedesktop.org/show_bug.cgi?id=30319) exactly the same way.

Change the upstream reference to 93d8573ddcf97648983a1c1b5cdda8a3ec6d4432
in README.chromium and remove 2 patches in chromium.patch because
they're all landed in the upstream @93d8573ddcf97648
Two removed patches are:

  - Fix OOB access (in Tibetan shaper) @ff0612c2e7df1b86fc
  - Fix crash! (in harfbuzz-gpos.c) @81c8ef785b079980a

In addition, the following upstream fix is included by going to 93d8573ddc.

  - Fix bug in contrib/harfbuzz-unicode.cc @93d8573ddcf9

Webkit bug to add a layout test for 'init' is
   https://bugs.webkit.org/show_bug.cgi?id=74310

BUG=107031
TEST=With Lohit Bengali font installed (the default on CrOS devices), go to http://i18nl10n.com/fonts/beng3.html and the result should be the same as the left in the screenshot attached to the bug instead of the right. A webkit layout test will be added and will be mentioned in the bug later.
Review URL: http://codereview.chromium.org/8895014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@114082 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 1 insertions, 1 deletions

diff --git a/third_party/harfbuzz/contrib/harfbuzz-unicode.c b/third_party/harfbuzz/contrib/harfbuzz-unicode.c
index 86458d0..f830216 100644
--- a/third_party/harfbuzz/contrib/harfbuzz-unicode.c
+++ b/third_party/harfbuzz/contrib/harfbuzz-unicode.c
@@ -114,7 +114,7 @@ hb_utf16_script_run_next(unsigned *num_code_points, HB_ScriptItem *output,
     const HB_Script script = code_point_to_script(cp);
 
     if (script != current_script) {
-      if (current_script == init_script == HB_Script_Inherited) {
+      if (current_script == HB_Script_Inherited && init_script == HB_Script_Inherited) {
         // If we started off as inherited, we take whatever we can find.
         output->script = script;
         current_script = script;