Linux: create a library loader code generator for dlopen and use it for libpci.

content/content_gpu.gypi

Index: content/content_gpu.gypi
diff --git a/content/content_gpu.gypi b/content/content_gpu.gypi
index 6b05cded06fe05e42c8b4a30a9eec2341c5bd208..66cb3c682adde8189014aaaef2d38b73d4f4c0c0 100644
--- a/content/content_gpu.gypi
+++ b/content/content_gpu.gypi
@@ -3,9 +3,6 @@
 # found in the LICENSE file.
 
 {
-  'variables': {
-    'linux_link_libpci%': 0,
-  },
   'dependencies': [
     '../base/base.gyp:base',
     '../skia/skia.gyp:skia',
@@ -100,6 +97,7 @@
     }],
     ['OS=="linux"', {
       'dependencies': [
+        '../build/linux/system.gyp:libpci',
         '../third_party/libXNVCtrl/libXNVCtrl.gyp:libXNVCtrl',
       ],
     }],
@@ -113,22 +111,5 @@
         '<(DEPTH)/third_party/libva',
       ],
     }],
-    ['linux_link_libpci==0', {
-      'defines': [
-        'DLOPEN_LIBPCI',
-      ],
-    }, { # linux_link_libpci==1
-      'cflags': [
-        '<!@(pkg-config --cflags libpci)',
-      ],
-      'link_settings': {
-        'ldflags': [
-          '<!@(pkg-config --libs-only-L --libs-only-other libpci)',
-        ],
-        'libraries': [
-          '<!@(pkg-config --libs-only-l libpci)',
-        ],
-      }
-    }],
   ],
 }