Add incremental_apk_by_default GN arg.

chrome/android/chrome_public_apk_tmpl.gni

Index: chrome/android/chrome_public_apk_tmpl.gni
diff --git a/chrome/android/chrome_public_apk_tmpl.gni b/chrome/android/chrome_public_apk_tmpl.gni
index 3e7f20a2dc1df965160f7dd28ef76e877424905e..6646b59bd9bc76804630d528afff966621c44200 100644
--- a/chrome/android/chrome_public_apk_tmpl.gni
+++ b/chrome/android/chrome_public_apk_tmpl.gni
@@ -41,7 +41,7 @@ template("chrome_public_apk_tmpl") {
         rebase_path("$root_gen_dir/CHROME_VERSION.json", root_out_dir)
     native_lib_version_arg = "@FileArg($_native_lib_file:full-quoted)"
     native_lib_version_rule = "//build/util:chrome_version_json"
-    
+
     if (is_java_debug) {
       enable_multidex = true
     } else {
@@ -99,6 +99,9 @@ template("monochrome_public_apk_tmpl") {
     enable_relocation_packing = true
     extensions_to_not_compress = ".lpak,.pak,.bin,.dat"
 
+    # Incremental install doesn't work for monochrome. See crbug.com/663492.
+    never_incremental = true
+
     # Configrations to make android load shared library from APK.
     uncompress_shared_libraries = true
     page_align_shared_libraries = true