extensions: Add CPU temperatures field to system.cpu.getInfo() function

extensions/test/data/system/cpu/test_cpu_api.js

Index: extensions/test/data/system/cpu/test_cpu_api.js
diff --git a/extensions/test/data/system/cpu/test_cpu_api.js b/extensions/test/data/system/cpu/test_cpu_api.js
index 746b46e9c486fa918b7ea65a262ebcc9200222e2..ff7f978cac5565a1fd665923836764a0d02d206b 100644
--- a/extensions/test/data/system/cpu/test_cpu_api.js
+++ b/extensions/test/data/system/cpu/test_cpu_api.js
@@ -22,6 +22,7 @@ chrome.test.runTests([
         chrome.test.assertEq("unknown", result.modelName);
         chrome.test.assertEq(["mmx", "avx"], result.features);
         chrome.test.assertEq(expectedProcessors, result.processors);
+        chrome.test.assertEq([30.125, 40.0625], result.temperatures);
       }));
     }
   }