Update Java Bridge to use its own thread in the browser process

chrome/browser/metrics/thread_watcher.cc

Index: chrome/browser/metrics/thread_watcher.cc
diff --git a/chrome/browser/metrics/thread_watcher.cc b/chrome/browser/metrics/thread_watcher.cc
index 8b740bfce281867204b061c0eade0a28d9e90d89..f4181a651647fcb0d3489f3cdab7a34f9ae3d54c 100644
--- a/chrome/browser/metrics/thread_watcher.cc
+++ b/chrome/browser/metrics/thread_watcher.cc
@@ -67,6 +67,10 @@ void ThreadUnresponsive_CACHE() {
   CHECK(false);
 }
 
+void ThreadUnresponsive_JAVA_BRIDGE() {
+  CHECK(false);
+}
+
 void ThreadUnresponsive_IO() {
   CHECK(false);
 }
@@ -98,6 +102,8 @@ void CrashBecauseThreadWasUnresponsive(BrowserThread::ID thread_id) {
       return ThreadUnresponsive_PROCESS_LAUNCHER();
     case BrowserThread::CACHE:
       return ThreadUnresponsive_CACHE();
+    case BrowserThread::JAVA_BRIDGE:
+      return ThreadUnresponsive_JAVA_BRIDGE();
     case BrowserThread::IO:
       return ThreadUnresponsive_IO();
 #if defined(OS_CHROMEOS)