Enable Ozone software implementation in GYP

ui/gfx/gfx.gyp

Index: ui/gfx/gfx.gyp
diff --git a/ui/gfx/gfx.gyp b/ui/gfx/gfx.gyp
index 48f0b2f98811f9864eb45beb51d30458ad5ae598..952be2a642602a5a0e3db2b0a705d2521b882113 100644
--- a/ui/gfx/gfx.gyp
+++ b/ui/gfx/gfx.gyp
@@ -135,6 +135,16 @@
         'matrix3_f.cc',
         'matrix3_f.h',
         'native_widget_types.h',
+        'ozone/impl/drm_skbitmap_ozone.cc',
+        'ozone/impl/drm_skbitmap_ozone.h',
+        'ozone/impl/drm_wrapper_ozone.cc',
+        'ozone/impl/drm_wrapper_ozone.h',
+        'ozone/impl/hardware_display_controller_ozone.cc',
+        'ozone/impl/hardware_display_controller_ozone.h',
+        'ozone/impl/software_surface_factory_ozone.cc',
+        'ozone/impl/software_surface_factory_ozone.h',
+        'ozone/impl/software_surface_ozone.cc',
+        'ozone/impl/software_surface_ozone.h',
         'ozone/surface_factory_ozone.cc',
         'ozone/surface_factory_ozone.h',
         'pango_util.cc',
@@ -357,6 +367,32 @@
             '<(DEPTH)/build/linux/system.gyp:pangocairo',
           ],
         }],
+        ['use_ozone==1', {

[rjkroege, 2013/10/18 14:54:05]

it would be nicer if you make this block look like the use_pang=1 block above
and move the bulk of this to system.gyp.

to avoid perplexity with the dual meaning of drm, I'd suggest not using drm by
itself as the target.

[dnicoara, 2013/10/18 16:00:50]

Done.

+          'conditions': [
+            ['sysroot!=""', {
+              'variables': {
+                'pkg-config': '../../build/linux/pkg-config-wrapper "<(sysroot)" "<(target_arch)"',
+              },
+            }, {
+              'variables': {
+                'pkg-config': 'pkg-config'
+              },
+            }],
+          ],
+          'cflags': [
+            '<!@(<(pkg-config) --cflags libdrm)',
+          ],
+          'direct_dependent_settings': {
+            'cflags': [
+              '<!@(<(pkg-config) --cflags libdrm)',
+            ],
+          },
+          'link_settings': {
+            'libraries': [
+              '<!@(<(pkg-config) --libs-only-l libdrm)',
+            ],
+          },
+        }],
       ],
       'target_conditions': [
         # Need 'target_conditions' to override default filename_rules to include