Make //blimp/client/app a real embedder of //blimp/client/public

blimp/client/app/android/java/src/org/chromium/blimp/app/BlimpEnvironment.java

Index: blimp/client/app/android/java/src/org/chromium/blimp/app/BlimpEnvironment.java
diff --git a/blimp/client/app/android/java/src/org/chromium/blimp/app/BlimpEnvironment.java b/blimp/client/app/android/java/src/org/chromium/blimp/app/BlimpEnvironment.java
new file mode 100644
index 0000000000000000000000000000000000000000..fe80430bfa7915990c0cccc5055076a20aeceb8c
--- /dev/null
+++ b/blimp/client/app/android/java/src/org/chromium/blimp/app/BlimpEnvironment.java
@@ -0,0 +1,58 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.blimp.app;
+
+import org.chromium.base.ThreadUtils;
+import org.chromium.base.annotations.CalledByNative;
+import org.chromium.base.annotations.JNINamespace;
+import org.chromium.blimp_public.BlimpClientContext;
+
+/**
+ * BlimpEnvironment is the core environment required to run Blimp for Android.
+ */
+@JNINamespace("blimp::client")
+public class BlimpEnvironment {
+    private static BlimpEnvironment sInstance;
+
+    private long mBlimpEnvironmentNativePtr;
+
+    public static BlimpEnvironment getInstance() {
+        ThreadUtils.assertOnUiThread();
+        if (sInstance == null) {
+            sInstance = new BlimpEnvironment();
+        }
+        return sInstance;
+    }
+
+    private static void clearInstance() {
+        ThreadUtils.assertOnUiThread();
+        sInstance = null;
+    }
+
+    private BlimpEnvironment() {
+        mBlimpEnvironmentNativePtr = nativeInit();
+    }
+
+    public void destroy() {
+        ThreadUtils.assertOnUiThread();
+        assert mBlimpEnvironmentNativePtr != 0;
+        nativeDestroy(mBlimpEnvironmentNativePtr);
+        mBlimpEnvironmentNativePtr = 0;
+        clearInstance();
+    }
+
+    public BlimpClientContext getBlimpClientContext() {
+        return nativeGetBlimpClientContext(mBlimpEnvironmentNativePtr);
+    }
+
+    @CalledByNative
+    private long getNativePtr() {
+        return mBlimpEnvironmentNativePtr;
+    }
+
+    private native long nativeInit();
+    private native void nativeDestroy(long nativeBlimpEnvironment);
+    private native BlimpClientContext nativeGetBlimpClientContext(long nativeBlimpEnvironment);
+}