Upstream the clipboard implementation for Android

base/android/jni_android.h

Index: base/android/jni_android.h
diff --git a/base/android/jni_android.h b/base/android/jni_android.h
index a5571e023fb87060a3b410d18eccb7124135fad9..a093b0b684d964edccb5917bef58540f07cf6958 100644
--- a/base/android/jni_android.h
+++ b/base/android/jni_android.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 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.
 
@@ -67,9 +67,15 @@ jfieldID GetFieldID(JNIEnv* env,
                     const char* field,
                     const char* jni_signature);
 
-// Returns true if an exception is pending in the provided JNIEnv*. If an
-// exception is pending, this function prints and then clears it.
-bool CheckException(JNIEnv* env);
+// Returns true if an exception is pending in the provided JNIEnv*.
+bool HasException(JNIEnv* env);
+
+// If an exception is pending in the provided JNIEnv*, this function clears it
+// and returns true.
+bool ClearException(JNIEnv* env);
+
+// This function will call CHECK() macro if there's any pending exception.
+void CheckException(JNIEnv* env);
 
 }  // namespace android
 }  // namespace base