Implemented curl support for web requests

libadblockplus.gyp

 {
   'variables': {
     'have_curl': '<!(python check_curl.py)'
   },
   'includes': ['third_party/v8/build/common.gypi',
                'shell/shell.gyp'],
   'targets': [{
     'target_name': 'libadblockplus',
     'type': '<(library)',
     'include_dirs': [
       'include',
       'third_party/v8/include'
     ],
     'defines': ['FILTER_ENGINE_STUBS=1'],
+    'all_dependent_settings': {
+      'defines': ['FILTER_ENGINE_STUBS=1']
+    },
     'dependencies': ['third_party/v8/tools/gyp/v8.gyp:v8'],
     'sources': [
       'src/ConsoleJsObject.cpp',
       'src/ErrorCallback.cpp',
       'src/FileReader.cpp',
       'src/FilterEngine.cpp',
       'src/GlobalJsObject.cpp',
       'src/JsEngine.cpp',
       'src/Thread.cpp',
-      'src/WebRequest.cpp',
       'src/WebRequestJsObject.cpp',
       '<(INTERMEDIATE_DIR)/adblockplus.js.cc'
     ],
     'direct_dependent_settings': {
       'include_dirs': ['include']
     },
     'export_dependent_settings': ['third_party/v8/tools/gyp/v8.gyp:v8'],
     'conditions': [
       ['have_curl==1',
         {
-          'defines': ['HAVE_CURL'],
+          'sources': [
+            'src/DefaultWebRequestCurl.cpp',
+          ],
           'all_dependent_settings': {
             'defines': ['HAVE_CURL'],
             'libraries': ['-lcurl']
           }
+        }
+      ],
+      ['have_curl!=1',
+        {
+          'sources': [
+            'src/DefaultWebRequestDummy.cpp',
+          ]
         }
       ]
     ],
     'actions': [{
       'action_name': 'convert_js',
       'variables': {
         'core_library_files': [
           'lib/info.js',
           'lib/io.js',
           'lib/prefs.js',
@@ skipping 26 matching lines @@
         '<@(core_library_files)',
         '--',
         '<@(additional_library_files)',
         '<@(_outputs)',
       ]
     }]
   },
   {
     'target_name': 'tests',
     'type': 'executable',
-    'defines': ['FILTER_ENGINE_STUBS=1'],
     'dependencies': [
       'third_party/googletest.gyp:googletest_main',
       'libadblockplus'
     ],
     'sources': [
       'test/ConsoleJsObject.cpp',
       'test/FilterEngineStubs.cpp',
       'test/GlobalJsObject.cpp',
       'test/JsEngine.cpp',
       'test/Thread.cpp',
       'test/WebRequest.cpp'
     ]
   }]
 }