Revert "libmojo: Uprev the library to r456626 from Chromium"

This reverts commit 8ac9103e05b66812c25348943383f9365d1ce3e0.

Reason for revert: Broke the mac_sdk
Exempt-From-Owner-Approval: Fixing mac_sdk

Change-Id: I0b74d1abaa66933a93fd6f82ff018e8948c1204e
diff --git a/base/android/java_runtime.h b/base/android/java_runtime.h
index 2034fb9..4ca889e 100644
--- a/base/android/java_runtime.h
+++ b/base/android/java_runtime.h
@@ -14,6 +14,9 @@
 // Wrapper class for using the java.lang.Runtime object from jni.
 class BASE_EXPORT JavaRuntime {
  public:
+  // Registers the jni class (once per process).
+  static bool Register(JNIEnv* env);
+
   // Fills the total memory used and memory allocated for objects by the java
   // heap in the current process. Returns true on success.
   static void GetMemoryUsage(long* total_memory, long* free_memory);