Add a Java API for UMA histograms.

base/BUILD.gn

 # Copyright (c) 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.
 
 import("//build/config/ui.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
 
@@ skipping 21 matching lines @@
     "android/content_uri_utils.h",
     "android/cpu_features.cc",
     "android/event_log.cc",
     "android/event_log.h",
     "android/field_trial_list.cc",
     "android/field_trial_list.h",
     "android/fifo_utils.cc",
     "android/fifo_utils.h",
     "android/important_file_writer_android.cc",
     "android/important_file_writer_android.h",
-    "android/locale_utils.cc",
-    "android/locale_utils.h",
-    "android/scoped_java_ref.cc",
-    "android/scoped_java_ref.h",
+    "android/java_handler_thread.cc",
+    "android/java_handler_thread.h",
     "android/jni_android.cc",
     "android/jni_android.h",
     "android/jni_array.cc",
     "android/jni_array.h",
     "android/jni_registrar.cc",
     "android/jni_registrar.h",
     "android/jni_string.cc",
     "android/jni_string.h",
     "android/jni_utils.cc",
     "android/jni_utils.h",
     "android/jni_weak_ref.cc",
     "android/jni_weak_ref.h",
+    "android/library_loader/library_load_from_apk_status_codes.h",
     "android/library_loader/library_loader_hooks.cc",
     "android/library_loader/library_loader_hooks.h",
-    "android/library_loader/library_load_from_apk_status_codes.h",
+    "android/locale_utils.cc",
+    "android/locale_utils.h",
     "android/memory_pressure_listener_android.cc",
     "android/memory_pressure_listener_android.h",
-    "android/java_handler_thread.cc",
-    "android/java_handler_thread.h",
     "android/path_service_android.cc",
     "android/path_service_android.h",
     "android/path_utils.cc",
     "android/path_utils.h",
+    "android/record_histogram.cc",
+    "android/record_histogram.h",
+    "android/scoped_java_ref.cc",
+    "android/scoped_java_ref.h",
     "android/sys_utils.cc",
     "android/sys_utils.h",
     "android/thread_utils.h",
     "android/trace_event_binding.cc",
     "android/trace_event_binding.h",
     "async_socket_io_handler.h",
     "async_socket_io_handler_posix.cc",
     "async_socket_io_handler_win.cc",
     "at_exit.cc",
     "at_exit.h",
@@ skipping 1353 matching lines @@
     sources = [
       "android/java/src/org/chromium/base/ApplicationStatus.java",
       "android/java/src/org/chromium/base/BuildInfo.java",
       "android/java/src/org/chromium/base/CommandLine.java",
       "android/java/src/org/chromium/base/ContentUriUtils.java",
       "android/java/src/org/chromium/base/CpuFeatures.java",
       "android/java/src/org/chromium/base/EventLog.java",
       "android/java/src/org/chromium/base/FieldTrialList.java",
       "android/java/src/org/chromium/base/ImportantFileWriterAndroid.java",
       "android/java/src/org/chromium/base/JNIUtils.java",
-      "android/java/src/org/chromium/base/library_loader/LibraryLoader.java",
+      "android/java/src/org/chromium/base/JavaHandlerThread.java",
       "android/java/src/org/chromium/base/LocaleUtils.java",
       "android/java/src/org/chromium/base/MemoryPressureListener.java",
-      "android/java/src/org/chromium/base/JavaHandlerThread.java",
       "android/java/src/org/chromium/base/PathService.java",
       "android/java/src/org/chromium/base/PathUtils.java",
       "android/java/src/org/chromium/base/PowerMonitor.java",
+      "android/java/src/org/chromium/base/SysUtils.java",
       "android/java/src/org/chromium/base/SystemMessageHandler.java",
-      "android/java/src/org/chromium/base/SysUtils.java",
       "android/java/src/org/chromium/base/ThreadUtils.java",
       "android/java/src/org/chromium/base/TraceEvent.java",
+      "android/java/src/org/chromium/base/library_loader/LibraryLoader.java",
+      "android/java/src/org/chromium/base/metrics/RecordHistogram.java",
     ]
     jni_package = "base"
   }
 
   # GYP: //base.gyp:base_java
   android_library("base_java") {
     srcjar_deps = [
       ":base_android_java_enums_srcjar",
       ":base_native_libraries_gen",
     ]
@@ skipping 65 matching lines @@
   # GYP: //base.gyp:base_unittests_apk
   unittest_apk("base_unittests_apk") {
     deps = [
       ":base_java",
       ":base_java_unittest_support",
       ":base_unittests",
     ]
     unittests_dep = ":base_unittests"
   }
 }