Add Settings[, Oberser] java code and JNI bridge.

blimp/client/core/context/blimp_client_context_impl_unittest.cc

Index: blimp/client/core/context/blimp_client_context_impl_unittest.cc
diff --git a/blimp/client/core/context/blimp_client_context_impl_unittest.cc b/blimp/client/core/context/blimp_client_context_impl_unittest.cc
index 66e45b67cafb5b038e760e9ea0d969f5165445dc..0723829e4748b1fb12e762e6b737517de59a62a0 100644
--- a/blimp/client/core/context/blimp_client_context_impl_unittest.cc
+++ b/blimp/client/core/context/blimp_client_context_impl_unittest.cc
@@ -22,6 +22,7 @@
 #include "ui/gfx/native_widget_types.h"
 
 #if defined(OS_ANDROID)
+#include "blimp/client/core/settings/android/settings_android.h"
 #include "ui/android/window_android.h"
 #endif  // defined(OS_ANDROID)
 
@@ -66,9 +67,14 @@ TEST_F(BlimpClientContextImplTest,
   TestingPrefServiceSimple prefs;
   Settings::RegisterPrefs(prefs.registry());
 
+#if defined(OS_ANDROID)
+  auto settings = base::MakeUnique<SettingsAndroid>(&prefs);

[David Trainor- moved to gerrit, 2016/11/07 18:30:58]

Don't make the Android one here.  We don't build the
BlimpClientContextImplAndroid, so we shouldn't build the SettingsAndroid

[Menglin, 2016/11/07 19:11:55]

Done.

+#else
+  auto settings = base::MakeUnique<Settings>(&prefs);
+#endif  // defined(OS_ANDROID)
   BlimpClientContextImpl blimp_client_context(
       io_thread_.task_runner(), io_thread_.task_runner(),
-      base::MakeUnique<MockCompositorDependencies>(), &prefs);
+      base::MakeUnique<MockCompositorDependencies>(), std::move(settings));
   TestBlimpClientContextDelegate delegate;
   blimp_client_context.SetDelegate(&delegate);