Add Protobuf support in cc for gfx objects

cc/BUILD.gn

Index: cc/BUILD.gn
diff --git a/cc/BUILD.gn b/cc/BUILD.gn
index 105004ae7e7cf1cf7014fa2914ae81a1db56bec2..b132d4c393dc27838388faedcff69c63fd43af7e 100644
--- a/cc/BUILD.gn
+++ b/cc/BUILD.gn
@@ -312,6 +312,8 @@ component("cc") {
     "playback/raster_source_helper.h",
     "playback/transform_display_item.cc",
     "playback/transform_display_item.h",
+    "proto/gfx_conversions.cc",
+    "proto/gfx_conversions.h",
     "quads/content_draw_quad_base.cc",
     "quads/content_draw_quad_base.h",
     "quads/debug_border_draw_quad.cc",
@@ -516,6 +518,7 @@ component("cc") {
   deps = [
     "//base",
     "//base/third_party/dynamic_annotations",
+    "//cc/proto:cc_proto",

[danakj, 2015/10/16 22:04:24]

how come you need :cc_proto here, and no just //cc/proto?

[David Trainor- moved to gerrit, 2015/10/19 17:04:38]

Ok I found out how to do this.  In component builds you can't use the same name
for a built lib as other targets, and something else was also named "proto." 
And to do //cc/proto you need a //cc/proto:proto target.  I ended up using a
group that lets me make this cleaner.

     "//cc/surfaces:surface_id",
     "//gpu",
     "//gpu/command_buffer/client:gles2_interface",
@@ -784,6 +787,7 @@ test("cc_unittests") {
     "playback/display_item_list_unittest.cc",
     "playback/display_list_raster_source_unittest.cc",
     "playback/display_list_recording_source_unittest.cc",
+    "proto/gfx_conversions_unittest.cc",
     "quads/draw_polygon_unittest.cc",
     "quads/draw_quad_unittest.cc",
     "quads/render_pass_unittest.cc",
@@ -863,6 +867,7 @@ test("cc_unittests") {
     ":cc",
     ":test_support",
     "//base/test:test_support",
+    "//cc/proto:cc_proto",

[danakj, 2015/10/16 22:04:24]

ditto

[David Trainor- moved to gerrit, 2015/10/19 17:04:38]

see above

     "//cc/surfaces",
     "//cc/surfaces:surface_id",
     "//gpu",
@@ -880,7 +885,9 @@ test("cc_unittests") {
     "//ui/gl:test_support",
   ]
 
-  data_deps = [ "//third_party/mesa:osmesa" ]
+  data_deps = [
+    "//third_party/mesa:osmesa",
+  ]
 }
 
 test("cc_perftests") {