Add browsertests for VibrationManager java impl on android.

content/public/android/BUILD.gn

Index: content/public/android/BUILD.gn
diff --git a/content/public/android/BUILD.gn b/content/public/android/BUILD.gn
index dc0d3f5a828f5184d3493beaa3a128638d1b7999..e8a086e83b866d65b973598a9af0576f9a2ecaa7 100644
--- a/content/public/android/BUILD.gn
+++ b/content/public/android/BUILD.gn
@@ -185,6 +185,8 @@ android_library("content_javatests") {
     "//content/shell/android:content_shell_java_resources",
     "//content/shell/android:content_shell_apk_java",
     "//content/shell/android:content_shell_test_java",
+    "//device/vibration/android:vibration_manager_android",

[timvolodine, 2015/10/20 13:16:22]

no similar gyp changes?

[leonhsl(Using Gerrit), 2015/10/22 10:47:57]

Yeah gyp has no need to do so.
gyp has no "content_javatests" target but instead it embeds the build into
"//content/content_tests.gypi:content_shell_test_apk", which has already
dependency on //device/vibration.

+    "//device/vibration:mojo_bindings_java",
     "//media/base/android:media_java",
     "//mojo/android:system_java",
     "//net/android:net_java",