[UNIX] Reorganize and cleanup main functions of GTK and EFL ports

[UNIX] Reorganize and cleanup main functions of GTK and EFL ports
https://bugs.webkit.org/show_bug.cgi?id=131024

Reviewed by Gustavo Noronha Silva.

Move main function implementation files to <process-dir>/EntryPoint/unix/<ProcessName>Main.cpp
files that are now shared by GTK and EFL ports. These files call a
main method that wraps a new method ChildProcessMain that contains
the common code and uses a helper class for the platform specific
code. GTK+ and EFL ports implement that helper class for every process type.

* NetworkProcess/EntryPoint/unix/NetworkProcessMain.cpp: Renamed from Source/WebKit2/efl/MainEfl.cpp.
(main):
* NetworkProcess/efl/NetworkProcessMainEfl.cpp: Renamed from Source/WebKit2/unix/NetworkMainUnix.cpp.
(WebKit::NetworkProcessMainUnix):
* NetworkProcess/gtk/NetworkProcessMainGtk.cpp: Renamed from Source/WebKit2/NetworkProcess/unix/NetworkProcessMainUnix.cpp.
(WebKit::NetworkProcessMainUnix):
* NetworkProcess/unix/NetworkProcessMainUnix.h:
* PlatformEfl.cmake:
* PlatformGTK.cmake:
* PluginProcess/EntryPoint/unix/PluginProcessMain.cpp: Renamed from Source/WebKit2/unix/PluginMainUnix.cpp.
(main):
* PluginProcess/unix/PluginProcessMainUnix.cpp:
(WebKit::webkitXError):
(WebKit::PluginProcessMainUnix):
* PluginProcess/unix/PluginProcessMainUnix.h:
* Shared/unix/ChildProcessMain.cpp: Copied from Source/WebKit2/WebProcess/efl/WebProcessMainEfl.h.
(WebKit::ChildProcessMainBase::parseCommandLine):
* Shared/unix/ChildProcessMain.h: Renamed from Source/WebKit2/WebProcess/gtk/WebProcessMainGtk.h.
(WebKit::ChildProcessMainBase::platformInitialize):
(WebKit::ChildProcessMainBase::platformFinalize):
(WebKit::ChildProcessMainBase::initializationParameters):
(WebKit::ChildProcessMain):
* WebProcess/EntryPoint/unix/WebProcessMain.cpp: Renamed from Source/WebKit2/gtk/MainGtk.cpp.
(main):
* WebProcess/efl/WebProcessMainEfl.cpp:
(WebKit::WebProcessMainUnix):
(dummyExtensionErrorHandler): Deleted.
* WebProcess/gtk/WebProcessMainGtk.cpp:
(WebKit::WebProcessMainUnix):
* WebProcess/unix/WebProcessMainUnix.h: Renamed from Source/WebKit2/WebProcess/efl/WebProcessMainEfl.h.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@169255 268f45cc-cd09-0410-ab3c-d52691b4dbfc