Add DCLayerOverlayProcessor and supporting DCLayer structures.

gpu/command_buffer/build_gles2_cmd_buffer.py

Index: gpu/command_buffer/build_gles2_cmd_buffer.py
diff --git a/gpu/command_buffer/build_gles2_cmd_buffer.py b/gpu/command_buffer/build_gles2_cmd_buffer.py
index ef72b12f184f04a0bd873979f76c06cd4c60d79a..e5a13b1bba22abd15e077d6bf97511157b16eac6 100755
--- a/gpu/command_buffer/build_gles2_cmd_buffer.py
+++ b/gpu/command_buffer/build_gles2_cmd_buffer.py
@@ -4387,6 +4387,23 @@ _FUNCTION_INFO = {
     'extension': 'CHROMIUM_schedule_ca_layer',
     'unit_test': False,
   },
+  'ScheduleDCLayerSharedStateCHROMIUM': {
+    'type': 'Custom',
+    'impl_func': False,
+    'client_test': False,
+    'cmd_args': 'GLfloat opacity, GLboolean is_clipped, '
+                'GLint z_order, GLuint shm_id, GLuint shm_offset',
+    'extension': 'CHROMIUM_schedule_ca_layer',
+  },
+  'ScheduleDCLayerCHROMIUM': {
+    'type': 'Custom',
+    'impl_func': False,
+    'client_test': False,
+    'cmd_args': 'GLuint contents_texture_id, GLuint background_color, '
+                'GLuint edge_aa_mask, GLuint filter, GLuint shm_id, '
+                'GLuint shm_offset',
+    'extension': 'CHROMIUM_schedule_ca_layer',
+  },
   'CommitOverlayPlanesCHROMIUM': {
     'impl_func': False,
     'decoder_func': 'DoCommitOverlayPlanes',