Merge heap unit tests into src.

src/heap/heap.gyp

 # Copyright 2014 the V8 project authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'v8_code': 1,
   },
   'includes': ['../../build/toolchain.gypi', '../../build/features.gypi'],
   'targets': [
     {
       'target_name': 'heap-unittests',
       'type': 'executable',
       'dependencies': [
-        '../../testing/gmock.gyp:gmock',
         '../../testing/gtest.gyp:gtest',
+        '../../testing/gtest.gyp:gtest_main',
         '../../tools/gyp/v8.gyp:v8_libplatform',
       ],
       'include_dirs': [
         '../..',
       ],
       'sources': [  ### gcmole(all) ###
-        'heap-unittest.cc',
-        'heap-unittests.cc',
+        'gc-idle-time-handler-unittest.cc',
       ],
       'conditions': [
         ['component=="shared_library"', {
           # heap-unittests can't be built against a shared library, so we
           # need to depend on the underlying static target in that case.
           'conditions': [
             ['v8_use_snapshot=="true"', {
               'dependencies': ['../../tools/gyp/v8.gyp:v8_snapshot'],
             },
             {
               'dependencies': [
                 '../../tools/gyp/v8.gyp:v8_nosnapshot',
               ],
             }],
           ],
         }, {
           'dependencies': ['../../tools/gyp/v8.gyp:v8'],
         }],
         ['os_posix == 1', {
           # TODO(svenpanne): This is a temporary work-around to fix the warnings
           # that show up because we use -std=gnu++0x instead of -std=c++11.
           'cflags!': [
             '-pedantic',
           ],
         }],
       ],
     },
   ],
 }