To use C++ API for BreakIterator in Blink, port getRuleStatus from ICU 52

patches/breakiterator.patch

+Index: README.chromium
+diff --git a/README.chromium b/README.chromium
+index 76acd4b06530827413286a72fed86771147c88d8..7e85c4949f1b52bbbda26e2d90b49852aaff7563 100644
+--- a/README.chromium
++++ b/README.chromium
+@@ -255,5 +255,5 @@ This directory contains the source code of ICU 4.6 for C/C++
+     - patches/csetdet.patch
+     - upstream bug: http://bugs.icu-project.org/trac/ticket/10318
+ 
+-
+-
++26. Add BreakIterator::getRuleStatus
++    - Copy and paste BreakIterator::getRuleStatus API from icu 52
+Index: patches/breakiterator.patch
+diff --git a/patches/breakiterator.patch b/patches/breakiterator.patch
+new file mode 100644
+index 0000000000000000000000000000000000000000..f1b36a34d0b408940a9c528fa0c796e2db6cb457
+--- /dev/null
++++ b/patches/breakiterator.patch
+@@ -0,0 +1,74 @@
++From c795f7766bd4f650a2396c834bc2a07768781ae8 Mon Sep 17 00:00:00 2001
++From: Igor Oliveira <igor.o@sisa.samsung.com>
++Date: Tue, 17 Sep 2013 14:43:07 -0700
++Subject: [PATCH] The CL https://codereview.chromium.org/23618052/ depends of
++ an API that will be added by libicu 5.2,
++ BreakIterator::getRuleStatus. This patch is just a copy and
++ paste of the libicu 5.2 API into chromium libicu.
++
++---
++ README.chromium                 |  3 +++
++ source/common/brkiter.cpp       |  7 +++++++
++ source/common/unicode/brkiter.h | 15 +++++++++++++++
++ 3 files changed, 25 insertions(+)
++
++diff --git a/README.chromium b/README.chromium
++index 76acd4b..eaf2e81 100644
++--- a/README.chromium
+++++ b/README.chromium
++@@ -255,5 +255,8 @@ This directory contains the source code of ICU 4.6 for C/C++
++     - patches/csetdet.patch
++     - upstream bug: http://bugs.icu-project.org/trac/ticket/10318
++ 
+++26. Add BreakIterator::getRuleStatus
+++    - Copy and paste BreakIterator::getRuleStatus API from icu 5.2
+++
++ 
++ 
++diff --git a/source/common/brkiter.cpp b/source/common/brkiter.cpp
++index 26f7b6a..41da826 100644
++--- a/source/common/brkiter.cpp
+++++ b/source/common/brkiter.cpp
++@@ -436,6 +436,13 @@ BreakIterator::getLocaleID(ULocDataLocaleType type, UErrorCode& status) const {
++     return locBased.getLocaleID(type, status);
++ }
++ 
+++// This implementation of getRuleStatus is a do-nothing stub, here to
+++// provide a default implementation for any derived BreakIterator classes that
+++// do not implement it themselves.
+++int32_t BreakIterator::getRuleStatus() const {
+++    return 0;
+++}
+++
++ U_NAMESPACE_END
++ 
++ #endif /* #if !UCONFIG_NO_BREAK_ITERATION */
++diff --git a/source/common/unicode/brkiter.h b/source/common/unicode/brkiter.h
++index bdd3cc7..1800336 100644
++--- a/source/common/unicode/brkiter.h
+++++ b/source/common/unicode/brkiter.h
++@@ -284,6 +284,21 @@ public:
++     virtual int32_t next(int32_t n) = 0;
++ 
++     /**
+++     * For RuleBasedBreakIterators, return the status tag from the
+++     * break rule that determined the most recently
+++     * returned break position.
+++     * <p>
+++     * For break iterator types that do not support a rule status,
+++     * a default value of 0 is returned.
+++     * <p>
+++     * @return the status from the break rule that determined the most recently
+++     *         returned break position.
+++     * @see RuleBaseBreakIterator::getRuleStatus()
+++     * @see UWordBreak
+++     */
+++    virtual int32_t getRuleStatus() const;
+++
+++    /**
++      * Create BreakIterator for word-breaks using the given locale.
++      * Returns an instance of a BreakIterator implementing word breaks.
++      * WordBreak is useful for word selection (ex. double click)
++-- 
++1.7.12.4 (Apple Git-37)
++
+Index: source/common/brkiter.cpp
+diff --git a/source/common/brkiter.cpp b/source/common/brkiter.cpp
+index 26f7b6a82e8b8981dce42a08d8fca6a2a42e81cc..41da826748370ad5caff57191e8c0f2f0da12c3e 100644
+--- a/source/common/brkiter.cpp
++++ b/source/common/brkiter.cpp
+@@ -436,6 +436,13 @@ BreakIterator::getLocaleID(ULocDataLocaleType type, UErrorCode& status) const {
+     return locBased.getLocaleID(type, status);
+ }
+ 
++// This implementation of getRuleStatus is a do-nothing stub, here to
++// provide a default implementation for any derived BreakIterator classes that
++// do not implement it themselves.
++int32_t BreakIterator::getRuleStatus() const {
++    return 0;
++}
++
+ U_NAMESPACE_END
+ 
+ #endif /* #if !UCONFIG_NO_BREAK_ITERATION */
+Index: source/common/unicode/brkiter.h
+diff --git a/source/common/unicode/brkiter.h b/source/common/unicode/brkiter.h
+index bdd3cc700f46e62e56f1fa84bfe0a6dcf18406da..180033661b12fa135782f23a6fa72ff8efb07878 100644
+--- a/source/common/unicode/brkiter.h
++++ b/source/common/unicode/brkiter.h
+@@ -284,6 +284,21 @@ public:
+     virtual int32_t next(int32_t n) = 0;
+ 
+     /**
++     * For RuleBasedBreakIterators, return the status tag from the
++     * break rule that determined the most recently
++     * returned break position.
++     * <p>
++     * For break iterator types that do not support a rule status,
++     * a default value of 0 is returned.
++     * <p>
++     * @return the status from the break rule that determined the most recently
++     *         returned break position.
++     * @see RuleBaseBreakIterator::getRuleStatus()
++     * @see UWordBreak
++     */
++    virtual int32_t getRuleStatus() const;
++
++    /**
+      * Create BreakIterator for word-breaks using the given locale.
+      * Returns an instance of a BreakIterator implementing word breaks.
+      * WordBreak is useful for word selection (ex. double click)