Templatize percentile_filter.h and move it to base/analytics.

webrtc/base/BUILD.gn

 # Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 import("//build/config/crypto.gni")
 import("//build/config/ui.gni")
@@ skipping 322 matching lines @@
         sources += [ "task_queue_win.cc" ]
       }
     }
   }
 }
 
 rtc_static_library("rtc_analytics") {
   sources = [
     "analytics/exp_filter.cc",
     "analytics/exp_filter.h",
+    "analytics/percentile_filter.h",
+  ]
+  deps = [
+    ":rtc_base_approved",
   ]
 }
 
 config("rtc_base_warnings_config") {
   if (is_win && is_clang) {
     cflags = [
       # Disable warnings failing when compiling with Clang on Windows.
       # https://bugs.chromium.org/p/webrtc/issues/detail?id=5366
       "-Wno-sign-compare",
       "-Wno-missing-braces",
@@ skipping 419 matching lines @@
       "java/src/org/webrtc/Logging.java",
       "java/src/org/webrtc/Size.java",
       "java/src/org/webrtc/ThreadUtils.java",
     ]
 
     deps = [
       "//base:base_java",
     ]
   }
 }