Fixing/disabling Windows x64 warnings

Disabled MSVC #4267 warnings in common.gypi to enable x64 builds
for Windows.
Fixed MSVC #4267 warnings in test/testsupport.
Added third_party/directxsdk to .gitignore.

With http://review.webrtc.org/1070008 landed, this should make it possible
to build for x64 on Windows.

BUG=1348
TEST=Compiling with http://review.webrtc.org/1070008 applied:
set GYP_DEFINES="target_arch=x64"
set GYP_GENERATORS=ninja
gclient sync
ninja -C out\Debug_x64

Review URL: https://webrtc-codereview.appspot.com/1060008

git-svn-id: http://webrtc.googlecode.com/svn/trunk@3464 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/audio_coding/codecs/isac/isacfix_test.gypi

@@ -23,6 +23,10 @@
       'sources': [
         './fix/test/kenny.cc',
       ],
+      # Disable warnings to enable Win64 build, issue 1323.
+      'msvs_disabled_warnings': [
+        4267,  # size_t to int truncation.
+      ],
     },
   ],
 }

webrtc/modules/audio_coding/main/source/audio_coding_module.gypi

@@ -211,6 +211,10 @@
              '../../neteq4/mock/mock_packet_buffer.h',
              '../../neteq4/mock/mock_payload_splitter.h',
           ],
+          # Disable warnings to enable Win64 build, issue 1323.
+          'msvs_disabled_warnings': [
+            4267,  # size_t to int truncation.
+          ],
         }, # audio_coding_unittests
       ],
     }],

webrtc/modules/audio_coding/neteq/neteq.gypi

@@ -99,6 +99,10 @@
           'sources': [
             'webrtc_neteq_unittest.cc',
           ],
+          # Disable warnings to enable Win64 build, issue 1323.
+          'msvs_disabled_warnings': [
+            4267,  # size_t to int truncation.
+          ],
         }, # neteq_unittests
         {
           'target_name': 'NetEqRTPplay',
@@ -137,6 +141,10 @@
           'sources': [
             'test/NetEqRTPplay.cc',
           ],
+          # Disable warnings to enable Win64 build, issue 1323.
+          'msvs_disabled_warnings': [
+            4267,  # size_t to int truncation.
+          ],
         },
 
         {
@@ -193,6 +201,10 @@
             'test/NETEQTEST_RTPpacket.cc',
             'test/NETEQTEST_RTPpacket.h',
           ],
+          # Disable warnings to enable Win64 build, issue 1323.
+          'msvs_disabled_warnings': [
+            4267,  # size_t to int truncation.
+          ],
         },
       ], # targets
     }], # include_tests

webrtc/modules/audio_coding/neteq4/neteq.gypi

@@ -113,6 +113,10 @@
         'time_stretch.cc',
         'time_stretch.h',
       ],
+      # Disable warnings to enable Win64 build, issue 1323.
+      'msvs_disabled_warnings': [
+        4267,  # size_t to int truncation.
+      ],
     },
   ], # targets
   'conditions': [
@@ -144,7 +148,11 @@
             'audio_decoder.cc',
             'interface/audio_decoder.h',
           ],
-        }, # audio_decoder_unittest
+          # Disable warnings to enable Win64 build, issue 1323.
+          'msvs_disabled_warnings': [
+            4267,  # size_t to int truncation.
+          ],
+        }, # audio_decoder_unittests
 
         {
           'target_name': 'neteq_unittest_tools',
@@ -168,6 +176,10 @@
             'tools/rtp_generator.cc',
             'tools/rtp_generator.h',
           ],
+          # Disable warnings to enable Win64 build, issue 1323.
+          'msvs_disabled_warnings': [
+            4267,  # size_t to int truncation.
+          ],
         }, # neteq_unittest_tools
       ], # targets
     }], # include_tests

webrtc/modules/audio_coding/neteq4/neteq_tests.gypi

@@ -60,6 +60,10 @@
       'sources': [
         'test/RTPencode.cc',
       ],
+      # Disable warnings to enable Win64 build, issue 1323.
+      'msvs_disabled_warnings': [
+        4267,  # size_t to int truncation.
+      ],
     },
 
     {
@@ -168,6 +172,10 @@
         'test/NETEQTEST_RTPpacket.cc',
         'test/NETEQTEST_RTPpacket.h',
       ],
+      # Disable warnings to enable Win64 build, issue 1323.
+      'msvs_disabled_warnings': [
+        4267,  # size_t to int truncation.
+      ],
     },
   ], # targets
 }