Mojo interface libraries: set install name and search path properly on Mac.

mojo/mojo_public.gypi

 {
   'targets': [
     {
       'target_name': 'mojo_system',
       'type': 'shared_library',
       'defines': [
         'MOJO_SYSTEM_IMPLEMENTATION',
       ],
       'include_dirs': [
         '..',
       ],
       'direct_dependent_settings': {
         'include_dirs': [
           '..',
         ],
       },
       'sources': [
         'public/system/async_waiter.h',
         'public/system/core.h',
         'public/system/core_cpp.h',
         'public/system/core_private.cc',
         'public/system/core_private.h',
         'public/system/macros.h',
         'public/system/system_export.h',
       ],
+      'conditions': [
+        ['OS=="mac"', {
+          'xcode_settings': {
+            # Make it a run-path dependent library.
+            'DYLIB_INSTALL_NAME_BASE': '@rpath',
+          },
+          'direct_dependent_settings': {
+            'xcode_settings': {
+              # Look for run-path dependent libraries in the loader's directory.
+              'LD_RUNPATH_SEARCH_PATHS': [ '@loader_path/.', ],
+            },
+          }, 
+        }],
+      ],
     },
     {
       'target_name': 'mojo_gles2',
       'type': 'shared_library',
       'defines': [
         'MOJO_GLES2_IMPLEMENTATION',
         'GLES2_USE_MOJO',
       ],
       'include_dirs': [
         '..',
       ],
       'dependencies': [
         '../third_party/khronos/khronos.gyp:khronos_headers'
       ],
       'direct_dependent_settings': {
         'include_dirs': [
           '..',
         ],
         'defines': [
           'GLES2_USE_MOJO',
         ],
       },
       'sources': [
         'public/gles2/gles2.h',
         'public/gles2/gles2_export.h',
         'public/gles2/gles2_private.cc',
         'public/gles2/gles2_private.h',
       ],
+      'conditions': [
+        ['OS=="mac"', {
+          'xcode_settings': {
+            # Make it a run-path dependent library.
+            'DYLIB_INSTALL_NAME_BASE': '@rpath',
+          },
+          'direct_dependent_settings': {
+            'xcode_settings': {
+              # Look for run-path dependent libraries in the loader's directory.
+              'LD_RUNPATH_SEARCH_PATHS': [ '@loader_path/.', ],
+            },
+          }, 
+        }],
+      ],
     },
     {
       'target_name': 'mojo_test_support',
       'type': 'shared_library',
       'defines': [
         'MOJO_TEST_SUPPORT_IMPLEMENTATION',
       ],
       'include_dirs': [
         '..',
       ],
       'direct_dependent_settings': {
         'include_dirs': [
           '..',
         ],
       },
       'sources': [
         'public/tests/test_support.h',
         'public/tests/test_support_private.cc',
         'public/tests/test_support_private.h',
         'public/tests/test_support_export.h',
       ],
+      'conditions': [
+        ['OS=="mac"', {
+          'xcode_settings': {
+            # Make it a run-path dependent library.
+            'DYLIB_INSTALL_NAME_BASE': '@rpath',
+          },
+          'direct_dependent_settings': {
+            'xcode_settings': {
+              # Look for run-path dependent libraries in the loader's directory.
+              'LD_RUNPATH_SEARCH_PATHS': [ '@loader_path/.', ],
+            },
+          }, 
+        }],
+      ],
     },
     {
       'target_name': 'mojo_public_test_utils',
       'type': 'static_library',
       'dependencies': [
         '../base/base.gyp:base',
         '../testing/gtest.gyp:gtest',
         'mojo_system',
         'mojo_test_support',
       ],
@@ skipping 215 matching lines @@
         'public/shell/shell.mojom',
       ],
       'includes': [ 'public/bindings/mojom_bindings_generator.gypi' ],
       'export_dependent_settings': [
         'mojo_bindings',
         'mojo_system',
       ],
     },
   ],
 }