Fix for bug 4126103.
mMessage in DrmInfoEvent is a reference to the message string, so the
temporary message created in the plugin was going out of scope and
being destructed while the message was being sent. Changed DrmInfoEvent's
mMessage to be const String8 instead of const String8&

Change-Id: I174197ad24f3df997d3bc1f897658cfc53862636
diff --git a/drm/common/DrmInfoEvent.cpp b/drm/common/DrmInfoEvent.cpp
index 8d115a8..27a5a2d 100644
--- a/drm/common/DrmInfoEvent.cpp
+++ b/drm/common/DrmInfoEvent.cpp
@@ -19,7 +19,7 @@
 
 using namespace android;
 
-DrmInfoEvent::DrmInfoEvent(int uniqueId, int infoType, const String8& message)
+DrmInfoEvent::DrmInfoEvent(int uniqueId, int infoType, const String8 message)
     : mUniqueId(uniqueId),
       mInfoType(infoType),
       mMessage(message) {
@@ -34,7 +34,7 @@
     return mInfoType;
 }
 
-const String8& DrmInfoEvent::getMessage() const {
+const String8 DrmInfoEvent::getMessage() const {
     return mMessage;
 }
 
diff --git a/include/drm/DrmInfoEvent.h b/include/drm/DrmInfoEvent.h
index add33d3..dfca228 100644
--- a/include/drm/DrmInfoEvent.h
+++ b/include/drm/DrmInfoEvent.h
@@ -77,7 +77,7 @@
      * @param[in] infoType Type of information
      * @param[in] message Message description
      */
-    DrmInfoEvent(int uniqueId, int infoType, const String8& message);
+    DrmInfoEvent(int uniqueId, int infoType, const String8 message);
 
     /**
      * Destructor for DrmInfoEvent
@@ -104,12 +104,12 @@
      *
      * @return Message description
      */
-    const String8& getMessage() const;
+    const String8 getMessage() const;
 
 private:
     int mUniqueId;
     int mInfoType;
-    const String8& mMessage;
+    const String8 mMessage;
 };
 
 };