[chromeos] Add an about:power UI.

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 6d640c7d5935d4679742cfde2ca4204d8d38d2c0..a108b841df2c95df9e6599786219053231318dd1 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -15353,6 +15353,25 @@ Do you accept?
       </message>
     </if>
 
+    <!-- About power UI display strings -->
+    <if expr="pp_ifdef('chromeos')">
+      <message name="IDS_ABOUT_POWER_TITLE" desc="Title of the page">
+        Power
+      </message>
+      <message name="IDS_ABOUT_POWER_RELOAD_BUTTON" desc="Text on the reload button">
+        Reload
+      </message>
+      <message name="IDS_ABOUT_POWER_BATTERY_CHARGE_HEADER" desc="Header of the battery charge section">
+        Battery Charge Percentage
+      </message>
+      <message name="IDS_ABOUT_POWER_NOT_ENOUGH_DATA" desc="String to display when enough plot data is not available">
+        Not enough data available yet.
+      </message>
+      <message name="IDS_ABOUT_POWER_TIME_AND_PLOT_DATA_MISMATCH" desc="String to display when there is a mismatch between time and plot data">
+        Mismatch in time and plot data.
+      </message>
+    </if>
+
     <!-- Local Device Discovery display strings -->
     <if expr="pp_ifdef('enable_mdns')">
       <message name="IDS_LOCAL_DISCOVERY_SERVICE_REGISTER" desc="Table header for registering a service">