Remove dead code and one static initializer that came with it.

BUG=1859
Review URL: http://codereview.chromium.org/8917004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10237 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/debug-agent.cc

@@ -229,8 +229,6 @@ void DebuggerAgentSession::Shutdown() {
 
 
 const char* const DebuggerAgentUtil::kContentLength = "Content-Length";
-const int DebuggerAgentUtil::kContentLengthSize =
-    StrLength(kContentLength);
 
 
 SmartArrayPointer<char> DebuggerAgentUtil::ReceiveMessage(const Socket* conn) {

src/debug-agent.h

@@ -115,7 +115,6 @@ class DebuggerAgentSession: public Thread {
 class DebuggerAgentUtil {
  public:
   static const char* const kContentLength;
-  static const int kContentLengthSize;
 
   static SmartArrayPointer<char> ReceiveMessage(const Socket* conn);
   static bool SendConnectMessage(const Socket* conn,