Revert of Media Galleries Partial Deprecation: Remove image metadata & libexif.

third_party/libexif/libexif.gyp

+# Copyright (c) 2012 The Chromium 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': {
+    'conditions': [
+      ['OS == "linux" and chromeos==0', {
+        'use_system_libexif%': 1,
+      }, {  # OS != "linux" and chromeos==0
+        'use_system_libexif%': 0,
+      }],
+    ],
+  },
+  'conditions': [
+    ['use_system_libexif==0', {
+      'targets': [
+        {
+          'target_name': 'libexif',
+          'type': 'loadable_module',
+          'sources': [
+            'sources/libexif/exif-byte-order.c',
+            'sources/libexif/exif-content.c',
+            'sources/libexif/exif-data.c',
+            'sources/libexif/exif-entry.c',
+            'sources/libexif/exif-format.c',
+            'sources/libexif/exif-ifd.c',
+            'sources/libexif/exif-loader.c',
+            'sources/libexif/exif-log.c',
+            'sources/libexif/exif-mem.c',
+            'sources/libexif/exif-mnote-data.c',
+            'sources/libexif/exif-tag.c',
+            'sources/libexif/exif-utils.c',
+            'sources/libexif/canon/exif-mnote-data-canon.c',
+            'sources/libexif/canon/mnote-canon-entry.c',
+            'sources/libexif/canon/mnote-canon-tag.c',
+            'sources/libexif/fuji/exif-mnote-data-fuji.c',
+            'sources/libexif/fuji/mnote-fuji-entry.c',
+            'sources/libexif/fuji/mnote-fuji-tag.c',
+            'sources/libexif/olympus/exif-mnote-data-olympus.c',
+            'sources/libexif/olympus/mnote-olympus-entry.c',
+            'sources/libexif/olympus/mnote-olympus-tag.c',
+            'sources/libexif/pentax/exif-mnote-data-pentax.c',
+            'sources/libexif/pentax/mnote-pentax-entry.c',
+            'sources/libexif/pentax/mnote-pentax-tag.c',
+          ],
+          'include_dirs': [
+            'sources',
+          ],
+          'direct_dependent_settings': {
+            'include_dirs': [
+              'sources',
+            ],
+          },
+          'variables': {
+            'clang_warning_flags': [
+              '-Wno-enum-conversion',
+              '-Wno-switch',
+              '-Wno-format',
+              # libexif uses fabs(int) to cast to float.
+              '-Wno-absolute-value',
+            ],
+          },
+          'conditions': [
+            ['os_posix==1 and OS!="mac"', {
+              'cflags!': ['-fvisibility=hidden'],
+              'libraries': ['-lm'],
+            }],
+            ['OS=="mac"', {
+              'conditions': [
+               ['mac_breakpad==1', {
+                  'variables': {
+                    'mac_real_dsym': 1,
+                  },
+               }],
+              ],
+              'xcode_settings': {
+                'GCC_SYMBOLS_PRIVATE_EXTERN': 'NO', # no -fvisibility=hidden
+              },
+            }],
+            ['OS=="win"', {
+              'product_name': 'libexif',
+              'sources': [
+                'libexif.def',
+              ],
+              'conditions': [
+                ['MSVS_VERSION < "2015"', {
+                  'defines': [
+                    # This seems like a hack, but this is what Safari Win does.
+                    # Luckily it is no longer needed/allowed with VS 2015.
+                    'snprintf=_snprintf',
+                  ],
+                }],
+              ],
+              'defines': [
+                'inline=__inline',
+              ],
+              'msvs_disabled_warnings': [
+                4018, # size/unsigned mismatch
+                4267, # size_t -> ExifLong truncation on amd64
+              ],
+              # As of VS 2013 Update 3, building this project with /analyze hits
+              # an internal compiler error on exif-entry.c. This halts the build
+              # and prevents subsequent analysis. Therefore, /analyze is
+              # disabled for this project. See this bug for details:
+              # https://connect.microsoft.com/VisualStudio/feedback/details/1014689/internal-compiler-error
+              'msvs_settings': {
+                'VCCLCompilerTool': {
+                  'AdditionalOptions!': [ '/analyze:WX-' ]
+                },
+              },
+            }],
+          ],
+        },
+      ],
+    }, { # 'use_system_libexif!=0
+      'targets': [
+        {
+          'target_name': 'libexif',
+          'type': 'none',
+          'direct_dependent_settings': {
+            'cflags': [
+                '<!@(<(pkg-config) --cflags libexif)',
+            ],
+            'defines': [
+              'USE_SYSTEM_LIBEXIF',
+            ],
+          },
+        }
+      ],
+    }],
+  ]
+}