Decouple PowerUsageMonitor{Impl} from //content/browser

chrome/test/BUILD.gn

Index: chrome/test/BUILD.gn
diff --git a/chrome/test/BUILD.gn b/chrome/test/BUILD.gn
index d7fe75de648fd9fc0bc3532d6e7540da74326bd1..e450931a66c3108256aa10e690468d297cac5f70 100644
--- a/chrome/test/BUILD.gn
+++ b/chrome/test/BUILD.gn
@@ -3537,6 +3537,7 @@ test("unit_tests") {
       "../browser/permissions/permission_request_manager_unittest.cc",
       "../browser/platform_util_unittest.cc",
       "../browser/power/process_power_collector_unittest.cc",
+      "../browser/power_usage_monitor/power_usage_monitor_impl_unittest.cc",
       "../browser/process_singleton_posix_unittest.cc",
       "../browser/profile_resetter/profile_resetter_unittest.cc",
       "../browser/profile_resetter/triggered_profile_resetter_win_unittest.cc",
@@ -3646,6 +3647,7 @@ test("unit_tests") {
     ]
     sources -=
         [ "../browser/download/download_request_infobar_delegate_unittest.cc" ]
+    deps += [ "//device/battery:mojo_bindings" ]
   }
 
   if (!is_ios && !is_android) {