Revert r6180 as it caused test failures

src/debug-agent.cc

Index: src/debug-agent.cc
===================================================================
--- src/debug-agent.cc	(revision 6182)
+++ src/debug-agent.cc	(working copy)
@@ -27,11 +27,9 @@
 
 
 #include "v8.h"
-#include "debug.h"
 #include "debug-agent.h"
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
-
 namespace v8 {
 namespace internal {
 
@@ -169,33 +167,22 @@
   while (true) {
     // Read data from the debugger front end.
     SmartPointer<char> message = DebuggerAgentUtil::ReceiveMessage(client_);
-
-    const char* msg = *message;
-    bool is_closing_session = (msg == NULL);
-
-    if (msg == NULL) {
-      // If we lost the connection, then simulate a disconnect msg:
-      msg = "{\"seq\":1,\"type\":\"request\",\"command\":\"disconnect\"}";
-
-    } else {
-      // Check if we're getting a disconnect request:
-      const char* disconnectRequestStr =
-          "\"type\":\"request\",\"command\":\"disconnect\"}";
-      const char* result = strstr(msg, disconnectRequestStr);
-      if (result != NULL) {
-        is_closing_session = true;
-      }
+    if (*message == NULL) {
+      // Session is closed.
+      agent_->OnSessionClosed(this);
+      return;
     }
 
     // Convert UTF-8 to UTF-16.
-    unibrow::Utf8InputBuffer<> buf(msg, StrLength(msg));
+    unibrow::Utf8InputBuffer<> buf(*message,
+                                   StrLength(*message));
     int len = 0;
     while (buf.has_more()) {
       buf.GetNext();
       len++;
     }
     ScopedVector<int16_t> temp(len + 1);
-    buf.Reset(msg, StrLength(msg));
+    buf.Reset(*message, StrLength(*message));
     for (int i = 0; i < len; i++) {
       temp[i] = buf.GetNext();
     }
@@ -203,12 +190,6 @@
     // Send the request received to the debugger.
     v8::Debug::SendCommand(reinterpret_cast<const uint16_t *>(temp.start()),
                            len);
-
-    if (is_closing_session) {
-      // Session is closed.
-      agent_->OnSessionClosed(this);
-      return;
-    }
   }
 }