Remove socket.h include from debug.h

Remove socket.h include from debug.h

Looks like there is no Socket usage in debug.h, so we don't need to
include it there.

TEST=in static build, ninja -C out/Debug/ d8
R=bmeurer@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=18459

[Benedikt Meurer, 2014-01-02 06:54:00]

Your patch breaks the build.

[Benedikt Meurer, 2014-01-02 06:54:20]

NOT LGTM

[tfarina, 2014-01-02 20:35:33]

On 2014/01/02 06:54:00, Benedikt Meurer wrote:
> Your patch breaks the build.

Could you paste the log/error somewhere, may be here?

[Benedikt Meurer, 2014-01-03 05:13:01]

On 2014/01/02 20:35:33, tfarina wrote:
> On 2014/01/02 06:54:00, Benedikt Meurer wrote:
> > Your patch breaks the build.
> 
> Could you paste the log/error somewhere, may be here?

Just run make debug

[Benedikt Meurer, 2014-01-03 05:14:46]

../src/d8-debug.cc: In member function ‘void v8::RemoteDebugger::Run()’:
../src/d8-debug.cc:178:18: error: invalid use of incomplete type ‘struct
v8::internal::Socket’
../src/debug-agent.h:40:7: error: forward declaration of ‘struct
v8::internal::Socket’
../src/d8-debug.cc:182:13: error: invalid use of incomplete type ‘struct
v8::internal::Socket’
../src/debug-agent.h:40:7: error: forward declaration of ‘struct
v8::internal::Socket’
../src/d8-debug.cc:184:53: error: incomplete type ‘v8::internal::Socket’ used in
nested name specifier

[tfarina, 2014-01-03 11:47:49]

Fixed! PTAL Benedikt.

The issue was that I had component:shared_library in my .gyp/include.gypi, so I
changed it to static_library and was able to reproduce the error:

$ ./build/gyp_v8 src/d8.gyp
$ ninja -C out/Debug/ v8

[tfarina, 2014-01-03 11:48:31]

On 2014/01/03 11:47:49, tfarina wrote:
> $ ninja -C out/Debug/ v8
$ ninja -C out/Debug/ d8

[Benedikt Meurer, 2014-01-07 08:27:35]

LGTM, I'll land it.

[Benedikt Meurer, 2014-01-07 08:28:00]

Committed patchset #2 manually as r18459 (presubmit successful).