Android: Integrates native and java SystemMonitor.

base/system_monitor/system_monitor.h

Index: base/system_monitor/system_monitor.h
diff --git a/base/system_monitor/system_monitor.h b/base/system_monitor/system_monitor.h
index ea95da89ccbe9fb6635b8ae905b6415ac977ca24..b897d90ab739a6927c6efee18310666c6c062376 100644
--- a/base/system_monitor/system_monitor.h
+++ b/base/system_monitor/system_monitor.h
@@ -38,6 +38,10 @@
 #include <objc/runtime.h>
 #endif  // OS_IOS
 
+#if defined(OS_ANDROID)
+#include <jni.h>
+#endif
+
 namespace base {
 
 // Class for monitoring various system-related subsystems
@@ -95,6 +99,10 @@ class BASE_EXPORT SystemMonitor {
 #endif  // OS_IOS
 #endif  // OS_MACOSX
 
+#if defined(OS_ANDROID)
+  static bool RegisterSystemMonitor(JNIEnv* env);
+#endif
+
   // Returns information for attached removable storage.
   std::vector<RemovableStorageInfo> GetAttachedRemovableStorage() const;