Use short include paths for icu headers.

This makes it possible to build with icu located
in another absolute path.

BUG=4242
R=andresp@webrtc.org, tommi@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/46079004

Cr-Commit-Position: refs/heads/master@{#9063}

DEPS

@@ -40,6 +40,7 @@ include_rules = [
   '+talk',
   '+testing',
   '+third_party',
+  '+unicode',
   '+webrtc',
 ]
 

talk/app/webrtc/java/jni/jni_helpers.cc

@@ -33,6 +33,8 @@
 #include <sys/syscall.h>
 #include <unistd.h>
 
+#include "unicode/unistr.h"
+
 namespace webrtc_jni {
 
 static JavaVM* g_jvm = nullptr;

talk/app/webrtc/java/jni/jni_helpers.h

@@ -36,7 +36,6 @@
 #include <string>
 
 #include "webrtc/base/checks.h"
-#include "third_party/icu/source/common/unicode/unistr.h"
 
 // Abort the process if |jni| has a Java exception pending.
 // This macros uses the comma operator to execute ExceptionDescribe

talk/app/webrtc/java/jni/peerconnection_jni.cc

@@ -70,7 +70,6 @@
 #include "talk/media/webrtc/webrtcvideocapturer.h"
 #include "talk/media/webrtc/webrtcvideodecoderfactory.h"
 #include "talk/media/webrtc/webrtcvideoencoderfactory.h"
-#include "third_party/icu/source/common/unicode/unistr.h"
 #include "webrtc/base/bind.h"
 #include "webrtc/base/checks.h"
 #include "webrtc/base/logging.h"

webrtc/examples/android/media_demo/jni/jni_helpers.cc

@@ -12,7 +12,7 @@
 
 #include <limits>
 
-#include "third_party/icu/source/common/unicode/unistr.h"
+#include "unicode/unistr.h"
 
 using icu::UnicodeString;
 

webrtc/modules/video_capture/android/device_info_android.cc

@@ -15,7 +15,7 @@
 #include <vector>
 
 #include "json/json.h"
-#include "third_party/icu/source/common/unicode/unistr.h"
+#include "unicode/unistr.h"
 #include "webrtc/modules/video_capture/android/video_capture_android.h"
 #include "webrtc/system_wrappers/interface/logging.h"
 #include "webrtc/system_wrappers/interface/ref_count.h"