Make channel available in Java via ChromeVersionConstants.java.

chrome/android/java/ChromeVersionConstants.java.version

Index: chrome/android/java/ChromeVersionConstants.java.version
diff --git a/chrome/android/java/ChromeVersionConstants.java.version b/chrome/android/java/ChromeVersionConstants.java.version
index d5e86609acc85b51f3fdebe33e05fed620f56a66..83b9a118f60bd1c98897b8257d4cc6c08fb81308 100644
--- a/chrome/android/java/ChromeVersionConstants.java.version
+++ b/chrome/android/java/ChromeVersionConstants.java.version
@@ -4,8 +4,15 @@
 
 package org.chromium.chrome.browser;
 
-public class ChromeVersionConstants {
-    public static final String PRODUCT_NAME = "@PRODUCT_FULLNAME@";
-    public static final String PRODUCT_VERSION = "@MAJOR@.@MINOR@.@BUILD@.@PATCH@";
-    public static final boolean IS_OFFICIAL_BUILD = @OFFICIAL_BUILD@ == 1;
+class ChromeVersionConstants {
+    static final String PRODUCT_NAME = "@PRODUCT_FULLNAME@";
+    static final String PRODUCT_VERSION = "@MAJOR@.@MINOR@.@BUILD@.@PATCH@";
+    static final boolean IS_OFFICIAL_BUILD = @OFFICIAL_BUILD@ == 1;
+
+    static final int CHANNEL_DEFAULT = 0;
+    static final int CHANNEL_CANARY = 1;
+    static final int CHANNEL_DEV = 2;
+    static final int CHANNEL_BETA = 3;
+    static final int CHANNEL_STABLE = 4;
+    static final int CHANNEL = CHANNEL_@CHANNEL@;
 }