Don't compile permissions infobars on desktop.
Don't compile permissions bubbles on Android.

this lops 31kB off my desktop Linux build (win and cros changes should be similar).

BUG=536129

Review URL: https://codereview.chromium.org/1373643002

Cr-Commit-Position: refs/heads/master@{#352093}
diff --git a/chrome/browser/BUILD.gn b/chrome/browser/BUILD.gn
index 6b5a1374..ee23e48 100644
--- a/chrome/browser/BUILD.gn
+++ b/chrome/browser/BUILD.gn
@@ -602,7 +602,12 @@
     sources += rebase_path(gypi_values.chrome_browser_notifications_sources,
                            ".",
                            "//chrome")
-    if (!is_android) {
+    if (is_android) {
+      sources +=
+          rebase_path(gypi_values.chrome_browser_notifications_android_sources,
+                      ".",
+                      "//chrome")
+    } else {
       sources += rebase_path(
               gypi_values.chrome_browser_notifications_non_android_sources,
               ".",