[Offline Pages] Added OfflinePageEvaluationBridge for testing.

chrome/android/java_sources.gni

Index: chrome/android/java_sources.gni
diff --git a/chrome/android/java_sources.gni b/chrome/android/java_sources.gni
index 8a06f485b8e64ec8da82882971509a5525a71788..f991e6b5fac8fc9968d5b3701db2d794ec0169c2 100644
--- a/chrome/android/java_sources.gni
+++ b/chrome/android/java_sources.gni
@@ -1082,6 +1082,11 @@ chrome_java_sources = [
   "java/src/org/chromium/chrome/browser/widget/newtab/NewTabButton.java",
 ]
 
+# Only used for testing, should not be shipped to end users.
+if (!is_official_build) {

[Pete Williamson, 2016/10/11 22:25:18]

Does this mean that the code ends up in Chromium but not Chrome?  Ideally, the
code would not even end up in Chromium, but only in our tests.

[agrieve, 2016/10/12 01:50:50]

Chromium builds also set is_official_build. (it's different from
is_chrome_branded)

+  chrome_java_sources += [ "java/src/org/chromium/chrome/browser/offlinepages/evaluation/OfflinePageEvaluationBridge.java" ]
+}
+
 chrome_vr_java_sources = [
   "java/src/org/chromium/chrome/browser/vr_shell/VrShell.java",
   "java/src/org/chromium/chrome/browser/vr_shell/VrWindowAndroid.java",