add a flag to enable/disable download interception on android

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index a9f341a047008e78ada979ac95134f00b11807d2..56f3bcafa9d6c745014e912f0474d4697a9cdd89 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -5691,6 +5691,14 @@ Keep your key file in a safe place. You will need it to create new versions of y
       <message name="IDS_FLAGS_JAVASCRIPT_HARMONY_DESCRIPTION" desc="Description for the flag to enable JavaScript Harmony features.">
         Enable web pages to use experimental JavaScript features.
       </message>
+      <if expr="is_android">
+        <message name="IDS_FLAGS_DOWNLOAD_INTERCEPTION_NAME" desc="Title for the flag to enable the download interception feature.">
+          Use native download manager when applicable.
+        </message>
+        <message name="IDS_FLAGS_DOWNLOAD_INTERCEPTION_DESCRIPTION" desc="Description for the flag to enable the download interception feature.">
+          Enable download interception by the native download manager.

[asanka, 2016/02/23 02:55:30]

I don't think users would understand what 'download interception' means. The
name above is clearer about what this flag does.

[qinmin, 2016/02/23 22:28:05]

Done. Changed the description to "Allow downloads to be handled by the system
download manager when applicable." and changed the flags name to
"IDS_FLAGS_ENABLE_SYSTEM_DOWNLOAD_MANAGER_XXX"

+        </message>
+      </if>
       <message name="IDS_FLAGS_DOWNLOAD_RESUMPTION_NAME" desc="Title for the flag to enable the download resume feature.">
         Download Resumption
       </message>