Use jinja2 to template webview manifest files.

android_webview/android_webview.gyp

Index: android_webview/android_webview.gyp
diff --git a/android_webview/android_webview.gyp b/android_webview/android_webview.gyp
index f20c3be27b995af7f04e2e62a32e17df39b7be2f..406445c1f6c729a5879bd645b63acb64a3f80db1 100644
--- a/android_webview/android_webview.gyp
+++ b/android_webview/android_webview.gyp
@@ -388,7 +388,8 @@
           'variables': {
             'apk_name': 'SystemWebView',
             'android_sdk_jar': '../third_party/android_platform/webview/frameworks_5.1.0_r1.jar',
-            'android_manifest_path': 'apk/java/AndroidManifest.xml',
+            'android_manifest_template_path': 'apk/java/AndroidManifest.xml',

[Torne, 2015/03/30 14:02:38]

This will be the same for all the users of system_webview_apk_common as well, we
should put that in the gypi too.

[Tobias Sargeant, 2015/03/30 15:54:14]

Done.

+            'android_manifest_template_vars': [ ],
             'java_in_dir': 'glue/java',
             'resource_dir': 'apk/java/res',
           },