Add flags to enable screen orientation lock for fullscreen video on Android.

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 199b3e478a992b5a95d4b521681bff681b1bf5f9..5945cd865268c6dcbabe588ee27ac8cb19489727 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -92435,6 +92435,7 @@ value.
   <int value="-741806604" label="DownloadsUi:disabled"/>
   <int value="-723224470" label="enable-password-force-saving:enabled"/>
   <int value="-716953514" label="disable-password-separated-signin-flow"/>
+  <int value="-714710496" label="VideoFullscreenOrientationLock:disabled"/>
   <int value="-711890895" label="enable-website-settings-manager"/>
   <int value="-699767107" label="enable-sync-app-list"/>
   <int value="-697751423" label="disable-quickoffice-component-app"/>
@@ -92641,6 +92642,7 @@ value.
   <int value="379326303" label="enable-add-to-shelf"/>
   <int value="379428799" label="security-chip-animation"/>
   <int value="385969127" label="disable-win32k-lockdown"/>
+  <int value="387178525" label="VideoFullscreenOrientationLock:enabled"/>
   <int value="400322063" label="ash-disable-screen-orientation-lock"/>
   <int value="401983950" label="enable-spdy4"/>
   <int value="402143634" label="enable-search-button-in-omnibox-always"/>