Implemented ForceMaximizeBrowserWindowOnFirstRun policy, added unit test and browser test.

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index 01963f4e74cdf4e458e63460de7f33f4c45d3792..ad9fcb3e180c2e6dadb806340344cd0edacbd0eb 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -47629,6 +47629,7 @@ Therefore, the affected-histogram name has to have at least one dot in it.
       label="Send monitoring heartbeats to the management server."/>
   <int value="294" label="How often the monitoring heartbeats are sent."/>
   <int value="295" label="Captive portal authentication ignores proxy"/>
+  <int value="296" label="Force maximize browser window on first run"/>

[bartfab (slow), 2015/04/01 14:22:43]

Nit: Please synchronize this with the caption in policy_templates.json.

[peletskyi, 2015/04/01 18:55:47]

Done.

[bartfab (slow), 2015/04/02 08:44:28]

No, not done.

[peletskyi, 2015/04/02 12:53:29]

Hm, on my machine it is 298...

[bartfab (slow), 2015/04/02 13:29:31]

Yes, the number is corect. What I meant was that the "label" here does not match
the "caption" in policy_templates.json. Unless there is good reason to deviate
form it, they should be the same.

[peletskyi, 2015/04/02 15:24:50]

Done.

 </enum>
 
 <enum name="EnterprisePolicyInvalidations" type="int">