Mojo: Add GetMinimumLogLevel() to the logger interface.

mojo/public/cpp/environment/lib/environment.cc

Index: mojo/public/cpp/environment/lib/environment.cc
diff --git a/mojo/public/cpp/environment/lib/environment.cc b/mojo/public/cpp/environment/lib/environment.cc
index b84aa7c74ee5997491004f03f2915075a97288dc..08428a9049098f0b79cef962a1777d9439e12df3 100644
--- a/mojo/public/cpp/environment/lib/environment.cc
+++ b/mojo/public/cpp/environment/lib/environment.cc
@@ -4,11 +4,13 @@
 
 #include "mojo/public/cpp/environment/environment.h"
 
+#include "mojo/public/cpp/environment/lib/default_logger_internal.h"
 #include "mojo/public/cpp/utility/run_loop.h"
 
 namespace mojo {
 
 Environment::Environment() {
+  SetMinimumLogLevel(MOJO_LOG_LEVEL_INFO);
   RunLoop::SetUp();
 }
 
@@ -16,4 +18,9 @@ Environment::~Environment() {
   RunLoop::TearDown();
 }
 
+// static
+void Environment::SetMinimumLogLevel(MojoLogLevel minimum_log_level) {
+  internal::SetMinimumLogLevel(minimum_log_level);
+}
+
 }  // namespace mojo