Decouple PowerUsageMonitor{Impl} from //content/browser

chrome/browser/BUILD.gn

Index: chrome/browser/BUILD.gn
diff --git a/chrome/browser/BUILD.gn b/chrome/browser/BUILD.gn
index 3dac7ad1b761e47c26146e28fb0c2fbd5ade0dd9..a7c25c39588b867b1dbbedfc550df754b5ecfb45 100644
--- a/chrome/browser/BUILD.gn
+++ b/chrome/browser/BUILD.gn
@@ -2783,6 +2783,8 @@ split_static_library("browser") {
       "pdf/pdf_extension_util.h",
       "power/process_power_collector.cc",
       "power/process_power_collector.h",
+      "power_usage_monitor/power_usage_monitor.cc",
+      "power_usage_monitor/power_usage_monitor.h",
       "process_singleton_modal_dialog_lock.cc",
       "process_singleton_modal_dialog_lock.h",
       "process_singleton_posix.cc",
@@ -2856,6 +2858,7 @@ split_static_library("browser") {
       "//chrome/browser/profile_resetter:profile_reset_report_proto",
       "//components/feedback",
       "//components/web_modal",
+      "//device/battery",
       "//net:net_browser_services",
     ]
   }