Make channel available in Java via ChromeVersionConstants.java.

chrome/android/BUILD.gn

 # Copyright 2014 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/android/config.gni")
 import("//build/config/android/rules.gni")
 import("//chrome/version.gni")
 import("//third_party/icu/config.gni")
+import("channel.gni")
 
 # GYP: //chrome/chrome.gyp:chrome_java (resources part)
 android_resources("chrome_java_resources") {
   resource_dirs = [
     "java/res",
   ]
   deps = [
     ":chrome_strings_grd",
     "//content/public/android:content_java_resources",
     "//chrome/app:java_strings_grd",
@@ skipping 443 matching lines @@
     ":uiautomator_tests_java"
   ]
 }
 
 # GYP: //chrome/chrome_android.gypi:chrome_version_java
 chrome_version_java_dir = "$root_gen_dir/templates/chrome_version_java"
 chrome_version_java_file = "$chrome_version_java_dir/org/chromium/chrome/browser/ChromeVersionConstants.java"
 process_version("chrome_version_java") {
   source = "java/ChromeVersionConstants.java.version"
   output = chrome_version_java_file
+  extra_args = ["-e", "CHANNEL=str.upper('$android_channel')"]
 }
 
 zip("chrome_version_srcjar") {
   inputs = [ chrome_version_java_file ]
   output = "$target_gen_dir/$target_name.srcjar"
   base_dir = chrome_version_java_dir
 }