Use Finch to compare the performances of CLD1 and CLD2

Add a compile time constant CLD_VERSION, which indicates the version of CLD. If this is not define, Finch test to compare CLD1 and CLD2 is supposed to be used.

By this CL, each platform will have the below status:

Linux:    Use both CLD1 and CLD2 (and use Finch).
Mac OS X: Use both CLD1 and CLD2 (and use Finch).
Windows:  Use only CLD1 once because now CLD2 can't be compiled on Windows. After we can have CLD2 compiled on Windows, we will use CLD2 and Finch asap.
iOS:      Still use only CLD1. (It's because it is hard to use both CLD1 and CLD2 on mobile platform because of the binary size impact.)
Android:  Still use only CLD1. (The same reason as iOS)

So some platforms will have two CLD binaries, but this is temporal in the sense that we intend to use Finch only for Dev and Beta channel. Before releasing the stable Chromium version, we decide which version of CLD is adopted, make another CL to use only one CLD, and send a merge request. (Of course, we hope we will be able to adopt CLD2.)

BUG=240647

Review URL: https://chromiumcodereview.appspot.com/22867032

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@221380 0039d316-1c4b-4281-b951-d872f2087c98

13 files changed, 432 insertions, 24 deletions

diff --git a/build/all.gyp b/build/all.gyp
index 32ad72a..ce9d61f 100644
--- a/build/all.gyp
+++ b/build/all.gyp
@@ -46,7 +46,6 @@
             '../printing/printing.gyp:*',
             '../skia/skia.gyp:*',
             '../third_party/cacheinvalidation/cacheinvalidation.gyp:*',
-            '../third_party/cld/cld.gyp:*',
             '../third_party/codesighs/codesighs.gyp:*',
             '../third_party/ffmpeg/ffmpeg.gyp:*',
             '../third_party/iccjpeg/iccjpeg.gyp:*',
diff --git a/build/common.gypi b/build/common.gypi
index 7df3e83..10d0c09 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -341,6 +341,12 @@
       # print, UI, etc.
       'enable_printing%': 1,
 
+      # Set the version of CLD.
+      #   0: Don't specify the version. This option is for the Finch testing.
+      #   1: Use only CLD1.
+      #   2: Use only CLD2.
+      'cld_version%': 0,
+
       # Enable spell checker.
       'enable_spellcheck%': 1,
 
@@ -510,10 +516,15 @@
           'enable_one_click_signin%': 1,
         }],
 
+        ['OS=="win"', {
+          'cld_version%': 1,
+        }],
+
         ['OS=="android"', {
           'enable_automation%': 0,
           'enable_extensions%': 0,
           'enable_google_now%': 0,
+          'cld_version%': 1,
           'enable_spellcheck%': 0,
           'enable_themes%': 0,
           'remoting%': 0,
@@ -563,6 +574,7 @@
           'enable_automation%': 0,
           'enable_extensions%': 0,
           'enable_google_now%': 0,
+          'cld_version%': 1,
           'enable_printing%': 0,
           'enable_session_service%': 0,
           'enable_themes%': 0,
@@ -851,6 +863,7 @@
     'enable_printing%': '<(enable_printing)',
     'enable_spellcheck%': '<(enable_spellcheck)',
     'enable_google_now%': '<(enable_google_now)',
+    'cld_version%': '<(cld_version)',
     'enable_captive_portal_detection%': '<(enable_captive_portal_detection)',
     'disable_ftp_support%': '<(disable_ftp_support)',
     'enable_task_manager%': '<(enable_task_manager)',
@@ -2272,6 +2285,9 @@
       ['enable_google_now==1', {
         'defines': ['ENABLE_GOOGLE_NOW=1'],
       }],
+      ['cld_version!=0', {
+        'defines': ['CLD_VERSION=<(cld_version)'],
+      }],
       ['enable_printing==1', {
         'defines': ['ENABLE_FULL_PRINTING=1', 'ENABLE_PRINTING=1'],
       }],
diff --git a/chrome/chrome_common.gypi b/chrome/chrome_common.gypi
index 7e4af84..c50836c 100644
--- a/chrome/chrome_common.gypi
+++ b/chrome/chrome_common.gypi
@@ -24,7 +24,6 @@
         # TODO(gregoryd): chrome_resources and chrome_strings could be
         #  shared with the 64-bit target, but it does not work due to a gyp
         # issue.
-        '../third_party/cld/cld.gyp:cld',
         'common_net',
         'common_version',
         'installer_util',
@@ -667,6 +666,16 @@
             'common/print_messages.h',
           ]
         }],
+        ['cld_version==0 or cld_version==1', {
+          'dependencies': [
+            '<(DEPTH)/third_party/cld/cld.gyp:cld',
+          ],
+        }],
+        ['cld_version==0 or cld_version==2', {
+          'dependencies': [
+            '<(DEPTH)/third_party/cld_2/cld_2.gyp:cld_2',
+          ],
+        }],
       ],
       'target_conditions': [
         ['OS == "ios"', {
diff --git a/chrome/chrome_dll.gypi b/chrome/chrome_dll.gypi
index c1e12a2..e7afe04 100644
--- a/chrome/chrome_dll.gypi
+++ b/chrome/chrome_dll.gypi
@@ -107,7 +107,6 @@
                 '../crypto/crypto.gyp:crypto',
                 '../printing/printing.gyp:printing',
                 '../net/net.gyp:net_resources',
-                '../third_party/cld/cld.gyp:cld',
                 '../ui/views/views.gyp:views',
                 '../webkit/webkit_resources.gyp:webkit_resources',
               ],
@@ -233,6 +232,16 @@
                 '../content/content.gyp:content_app_browser',
               ],
             }],
+            ['cld_version==0 or cld_version==1', {
+              'dependencies': [
+                '../third_party/cld/cld.gyp:cld',
+              ],
+            }],
+            ['cld_version==0 or cld_version==2', {
+              'dependencies': [
+                '../third_party/cld_2/cld_2.gyp:cld_2',
+              ],
+            }],
             ['OS=="mac" and component!="shared_library"', {
               'includes': [ 'chrome_dll_bundle.gypi' ],
             }],
diff --git a/chrome/chrome_tests.gypi b/chrome/chrome_tests.gypi
index 861b031..33a5ac6 100644
--- a/chrome/chrome_tests.gypi
+++ b/chrome/chrome_tests.gypi
@@ -1151,7 +1151,6 @@
         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
         '../third_party/cacheinvalidation/cacheinvalidation.gyp:cacheinvalidation',
-        '../third_party/cld/cld.gyp:cld',
         '../third_party/icu/icu.gyp:icui18n',
         '../third_party/icu/icu.gyp:icuuc',
         '../third_party/leveldatabase/leveldatabase.gyp:leveldatabase',
@@ -2165,7 +2164,6 @@
         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
         '../testing/perf/perf_test.gyp:*',
-        '../third_party/cld/cld.gyp:cld',
         '../third_party/icu/icu.gyp:icui18n',
         '../third_party/icu/icu.gyp:icuuc',
         '../third_party/leveldatabase/leveldatabase.gyp:leveldatabase',
diff --git a/chrome/chrome_tests_unit.gypi b/chrome/chrome_tests_unit.gypi
index 7bad8b0..0461a11 100644
--- a/chrome/chrome_tests_unit.gypi
+++ b/chrome/chrome_tests_unit.gypi
@@ -487,14 +487,6 @@
       'include_dirs': [
         '..',
       ],
-      'defines': [
-        'CLD_WINDOWS',
-      ],
-      'direct_dependent_settings': {
-        'defines': [
-          'CLD_WINDOWS',
-        ],
-      },
       'msvs_settings': {
         'VCLinkerTool': {
           'conditions': [
@@ -1940,7 +1932,6 @@
         '../skia/ext/skia_utils_mac_unittest.mm',
         '../skia/ext/vector_canvas_unittest.cc',
         '../testing/gtest_mac_unittest.mm',
-        '../third_party/cld/encodings/compact_lang_det/compact_lang_det_unittest_small.cc',
         '../third_party/zlib/google/zip_reader_unittest.cc',
         '../third_party/zlib/google/zip_unittest.cc',
         '../tools/json_schema_compiler/test/additional_properties_unittest.cc',
@@ -1978,7 +1969,6 @@
             '../gpu/gpu.gyp:gpu_unittest_utils',
             '../media/media.gyp:media_test_support',
             '../ppapi/ppapi_internal.gyp:ppapi_unittest_shared',
-            '../third_party/cld/cld.gyp:cld',
             '../third_party/leveldatabase/leveldatabase.gyp:leveldatabase',
             '../third_party/libjingle/libjingle.gyp:libjingle',
             '../third_party/libphonenumber/libphonenumber.gyp:libphonenumber',
@@ -2635,6 +2625,22 @@
             ['exclude', '^browser/extensions/blacklist_unittest.cc'],
           ],
         }],
+        ['cld_version==0 or cld_version==1', {
+          'defines': [
+            'CLD_WINDOWS',
+          ],
+          'direct_dependent_settings': {
+            'defines': [
+              'CLD_WINDOWS',
+            ],
+          },
+          'sources': [
+            '../third_party/cld/encodings/compact_lang_det/compact_lang_det_unittest_small.cc',
+          ],
+          'dependencies': [
+            '../third_party/cld/cld.gyp:cld',
+          ],
+        }],
       ],
       'target_conditions': [
         ['OS == "ios"', {
diff --git a/chrome/common/DEPS b/chrome/common/DEPS
index 18b6bce..a8dafbc 100644
--- a/chrome/common/DEPS
+++ b/chrome/common/DEPS
@@ -26,6 +26,7 @@ include_rules = [
   "+third_party/bzip2",
   "+third_party/cld",
   "+third_party/cld/encodings/compact_lang_det/win",
+  "+third_party/cld_2/src",
   "+third_party/mt19937ar",
   "+third_party/npapi",
   "+third_party/re2",
diff --git a/chrome/common/translate/language_detection_util.cc b/chrome/common/translate/language_detection_util.cc
index 73e4823..ccb6154 100644
--- a/chrome/common/translate/language_detection_util.cc
+++ b/chrome/common/translate/language_detection_util.cc
@@ -5,14 +5,23 @@
 #include "chrome/common/translate/language_detection_util.h"
 
 #include "base/logging.h"
+#include "base/metrics/field_trial.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
+#include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/translate/translate_common_metrics.h"
 #include "chrome/common/translate/translate_util.h"
+
+#if !defined(CLD_VERSION) || CLD_VERSION==1
 #include "third_party/cld/encodings/compact_lang_det/compact_lang_det.h"
 #include "third_party/cld/encodings/compact_lang_det/win/cld_unicodetext.h"
+#endif
+
+#if !defined(CLD_VERSION) || CLD_VERSION==2
+#include "third_party/cld_2/src/public/compact_lang_det.h"
+#endif
 
 namespace {
 
@@ -61,18 +70,63 @@ void ApplyLanguageCodeCorrection(std::string* code) {
   TranslateUtil::ToTranslateLanguageSynonym(code);
 }
 
+int GetCLDMajorVersion() {
+#if !defined(CLD_VERSION)
+  std::string group_name = base::FieldTrialList::FindFullName("CLD1VsCLD2");
+  if (group_name == "CLD2")
+    return 2;
+  else
+    return 1;
+#else
+  return CLD_VERSION;
+#endif
+}
+
 // Returns the ISO 639 language code of the specified |text|, or 'unknown' if it
 // failed.
 // |is_cld_reliable| will be set as true if CLD says the detection is reliable.
 std::string DetermineTextLanguage(const base::string16& text,
                                   bool* is_cld_reliable) {
   std::string language = chrome::kUnknownLanguageCode;
-  int num_languages = 0;
   int text_bytes = 0;
   bool is_reliable = false;
-  Language cld_language =
-      DetectLanguageOfUnicodeText(NULL, text.c_str(), true, &is_reliable,
-                                  &num_languages, NULL, &text_bytes);
+
+  // Language or CLD2::Language
+  int cld_language = 0;
+  bool is_valid_language = false;
+
+  switch (GetCLDMajorVersion()) {
+#if !defined(CLD_VERSION) || CLD_VERSION==1
+    case 1: {
+      int num_languages = 0;
+      cld_language =
+          DetectLanguageOfUnicodeText(NULL, text.c_str(), true, &is_reliable,
+                                      &num_languages, NULL, &text_bytes);
+      is_valid_language = cld_language != NUM_LANGUAGES &&
+          cld_language != UNKNOWN_LANGUAGE &&
+          cld_language != TG_UNKNOWN_LANGUAGE;
+      break;
+    }
+#endif
+#if !defined(CLD_VERSION) || CLD_VERSION==2
+    case 2: {
+      std::string utf8_text(UTF16ToUTF8(text));
+      CLD2::Language language3[3];
+      int percent3[3];
+      cld_language =
+          CLD2::DetectLanguageSummary(utf8_text.c_str(), utf8_text.size(), true,
+                                      language3, percent3,
+                                      &text_bytes, &is_reliable);
+      is_valid_language = cld_language != CLD2::NUM_LANGUAGES &&
+          cld_language != CLD2::UNKNOWN_LANGUAGE &&
+          cld_language != CLD2::TG_UNKNOWN_LANGUAGE;
+      break;
+    }
+#endif
+    default:
+      NOTREACHED();
+  }
+
   if (is_cld_reliable != NULL)
     *is_cld_reliable = is_reliable;
 
@@ -82,15 +136,33 @@ std::string DetermineTextLanguage(const base::string16& text,
   // TODO(toyoshim): CLD provides |is_reliable| flag. But, it just says that
   // the determined language code is correct with 50% confidence. Chrome should
   // handle the real confidence value to judge.
-  if (is_reliable && text_bytes >= 100 && cld_language != NUM_LANGUAGES &&
-      cld_language != UNKNOWN_LANGUAGE && cld_language != TG_UNKNOWN_LANGUAGE) {
+  if (is_reliable && text_bytes >= 100 && is_valid_language) {
     // We should not use LanguageCode_ISO_639_1 because it does not cover all
     // the languages CLD can detect. As a result, it'll return the invalid
     // language code for tradtional Chinese among others.
     // |LanguageCodeWithDialect| will go through ISO 639-1, ISO-639-2 and
     // 'other' tables to do the 'right' thing. In addition, it'll return zh-CN
     // for Simplified Chinese.
-    language = LanguageCodeWithDialects(cld_language);
+    switch (GetCLDMajorVersion()) {
+#if !defined(CLD_VERSION) || CLD_VERSION==1
+      case 1:
+        language =
+            LanguageCodeWithDialects(static_cast<Language>(cld_language));
+        break;
+#endif
+#if !defined(CLD_VERSION) || CLD_VERSION==2
+      case 2:
+        if (cld_language == CLD2::CHINESE) {
+          language = "zh-CN";
+        } else {
+          language =
+              CLD2::LanguageCode(static_cast<CLD2::Language>(cld_language));
+        }
+        break;
+#endif
+      default:
+        NOTREACHED();
+    }
   }
   VLOG(9) << "Detected lang_id: " << language << ", from Text:\n" << text
           << "\n*************************************\n";
@@ -291,7 +363,19 @@ bool MaybeServerWrongConfiguration(const std::string& page_language,
 }
 
 std::string GetCLDVersion() {
-  return CompactLangDet::DetectLanguageVersion();
+  switch (GetCLDMajorVersion()) {
+#if !defined(CLD_VERSION) || CLD_VERSION==1
+    case 1:
+      return CompactLangDet::DetectLanguageVersion();
+#endif
+#if !defined(CLD_VERSION) || CLD_VERSION==2
+    case 2:
+      return CLD2::DetectLanguageVersion();
+#endif
+    default:
+      NOTREACHED();
+  }
+  return "";
 }
 
 }  // namespace LanguageDetectionUtil
diff --git a/third_party/cld/README.chromium b/third_party/cld/README.chromium
index af2df72..35074cc 100644
--- a/third_party/cld/README.chromium
+++ b/third_party/cld/README.chromium
@@ -1,7 +1,7 @@
 Name: Compact Language Detection
 Short Name: cld
 URL: http://src.chromium.org/viewvc/chrome/trunk/src/third_party/cld/
-Version: unknown
+Version: 0
 License: BSD
 Security Critical: yes
 
diff --git a/third_party/cld_2/LICENSE b/third_party/cld_2/LICENSE
new file mode 100644
index 0000000..d645695
--- /dev/null
+++ b/third_party/cld_2/LICENSE
@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
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+
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+
+      "Legal Entity" shall mean the union of the acting entity and all
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+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
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+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/third_party/cld_2/OWNERS b/third_party/cld_2/OWNERS
new file mode 100644
index 0000000..a214ab1
--- /dev/null
+++ b/third_party/cld_2/OWNERS
@@ -0,0 +1,3 @@
+hajimehoshi@chromium.org
+mad@chromium.org
+toyoshim@chromium.org
diff --git a/third_party/cld_2/README.chromium b/third_party/cld_2/README.chromium
new file mode 100644
index 0000000..b203255
--- /dev/null
+++ b/third_party/cld_2/README.chromium
@@ -0,0 +1,10 @@
+Name: Compact Language Detection 2
+Short Name: cld_2
+URL: https://code.google.com/p/cld2/
+Version: 0
+License: Apache 2.0
+Security Critical: yes
+
+Description:
+The CLD is used to determine the language of text. In Chromium, this is used
+to determine if Chrome should offer Translate UX to the user.
diff --git a/third_party/cld_2/cld_2.gyp b/third_party/cld_2/cld_2.gyp
new file mode 100644
index 0000000..41f229d
--- /dev/null
+++ b/third_party/cld_2/cld_2.gyp
@@ -0,0 +1,71 @@
+# Copyright 2013 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+{
+  'targets': [
+    {
+      'target_name': 'cld_2',
+      'type': 'static_library',
+      'include_dirs': [
+        'src/internal',
+        'src/public',
+      ],
+      'sources': [
+        'src/internal/cld2_generated_cjk_compatible.cc',
+        'src/internal/cld2_generated_deltaoctachrome0614.cc',
+        'src/internal/cld2_generated_distinctoctachrome0604.cc',
+        'src/internal/cld2_generated_octa2_dummy.cc',
+        'src/internal/cld2_generated_quadchrome0715.cc',
+        'src/internal/cld2tablesummary.h',
+        'src/internal/cld_generated_cjk_delta_bi_32.cc',
+        'src/internal/cld_generated_cjk_delta_bi_4.cc',
+        'src/internal/cld_generated_cjk_uni_prop_80.cc',
+        'src/internal/cld_generated_score_quad_octa_1024_256.cc',
+        'src/internal/cldutil.cc',
+        'src/internal/cldutil.h',
+        'src/internal/cldutil_offline.cc',
+        'src/internal/cldutil_offline.h',
+        'src/internal/cldutil_shared.cc',
+        'src/internal/cldutil_shared.h',
+        'src/internal/compact_lang_det.cc',
+        'src/internal/compact_lang_det_hint_code.cc',
+        'src/internal/compact_lang_det_hint_code.h',
+        'src/internal/compact_lang_det_impl.cc',
+        'src/internal/compact_lang_det_impl.h',
+        'src/internal/debug.cc',
+        'src/internal/debug_empty.cc',
+        'src/internal/debug.h',
+        'src/internal/fixunicodevalue.cc',
+        'src/internal/fixunicodevalue.h',
+        'src/internal/generated_distinct_bi_0.cc',
+        'src/internal/generated_entities.cc',
+        'src/internal/generated_language.cc',
+        'src/internal/generated_language.h',
+        'src/internal/generated_ulscript.cc',
+        'src/internal/generated_ulscript.h',
+        'src/internal/getonescriptspan.cc',
+        'src/internal/getonescriptspan.h',
+        'src/internal/integral_types.h',
+        'src/internal/lang_script.cc',
+        'src/internal/lang_script.h',
+        'src/internal/langspan.h',
+        'src/internal/offsetmap.cc',
+        'src/internal/offsetmap.h',
+        'src/internal/port.h',
+        'src/internal/scoreonescriptspan.cc',
+        'src/internal/scoreonescriptspan.h',
+        'src/internal/stringpiece.h',
+        'src/internal/tote.cc',
+        'src/internal/tote.h',
+        'src/internal/utf8prop_lettermarkscriptnum.h',
+        'src/internal/utf8repl_lettermarklower.h',
+        'src/internal/utf8scannot_lettermarkspecial.h',
+        'src/internal/utf8statetable.cc',
+        'src/internal/utf8statetable.h',
+        'src/public/compact_lang_det.h',
+        'src/public/encodings.h',
+      ],
+    },
+  ],
+}