Fix a race condition in the Java Bridge when adding objects

content/common/java_bridge_messages.h

Index: content/common/java_bridge_messages.h
diff --git a/content/common/java_bridge_messages.h b/content/common/java_bridge_messages.h
index 4329f719ec8ea35e7af493a5d562e1cf1b05791e..2d6ff9d1e0bac7588d96dd9382bbee85be4e1ad6 100644
--- a/content/common/java_bridge_messages.h
+++ b/content/common/java_bridge_messages.h
@@ -15,8 +15,11 @@
 // Messages for handling Java objects injected into JavaScript -----------------
 
 // Sent from browser to renderer to initialize the Java Bridge.
-IPC_MESSAGE_ROUTED1(JavaBridgeMsg_Init,
-                    IPC::ChannelHandle) /* channel handle */
+IPC_MESSAGE_ROUTED0(JavaBridgeMsg_Init)
+
+// Sent from renderer to browser to get the channel handle for NP channel.
+IPC_SYNC_MESSAGE_ROUTED0_1(JavaBridgeMsg_GetChannelHandle,

[jam, 2011/12/07 22:07:03]

nit: renderer-> browser messages should have Host in them, i.e.
JavaBridgeHostMsg_..., and it should be listed at the bottom of the file (see
other files for example)

[Steve Block, 2011/12/08 11:17:56]

Done.

+                           IPC::ChannelHandle) /* channel handle */
 
 // Sent from browser to renderer to add a Java object with the given name.
 IPC_MESSAGE_ROUTED2(JavaBridgeMsg_AddNamedObject,