Add a feature flag for enabling transparent doodle request.

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 3bee3a4e25c65bb5eb4edcd0e927d28df1ab3737..d585f62809e6a9379456e97819eb348bf31c9f27 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -14821,6 +14821,15 @@ Please check your email at <ph name="ACCOUNT_EMAIL">$2<ex>jane.doe@gmail.com</ex
     </if>
 
     <if expr="is_android">
+      <message name="IDS_FLAGS_ENABLE_NTP_TRANSPARENT_DOODLE_NAME" desc="Name for the flag to enable transparent doodle request." translateable="false">

[Marc Treib, 2016/05/10 07:58:39]

Interesting - some flags specify translateable=false, but it looks like most
don't. Do you know if there's any rule for that?
(I agree that there's no reason for translating this, I'm just curious.)

[atanasova, 2016/05/10 08:38:41]

I am not sure what the rule for this is, but since this will be a temporary flag
until we have the server side feature done, I thought it made sense.

[Marc Treib, 2016/05/10 08:54:59]

Actually now that I think of it, I'm not sure if we even need an about:flags
entry for this - controlling it via Finch, or via the command line for testing,
might be good enough. But I guess there's no harm in adding the about:flags
entry too.

[atanasova, 2016/05/10 09:12:54]

Acknowledged.

+        Request transparent doodle
+      </message>
+      <message name="IDS_FLAGS_ENABLE_NTP_TRANSPARENT_DOODLE_DESCRIPTION" desc="Description for the flag to enable transparent doodle requests." translateable="false">
+        If enabled, the request to get a doodle will include the transparent flag.
+      </message>
+    </if>
+
+    <if expr="is_android">
       <message name="IDS_FLAGS_IME_THREAD_NAME" desc="Name for the flag to use IME thread.">
         Run IME on its own thread.
       </message>