color: Clean up dependencies to allow including in cc/paint

ui/gfx/BUILD.gn

Index: ui/gfx/BUILD.gn
diff --git a/ui/gfx/BUILD.gn b/ui/gfx/BUILD.gn
index 77856daaebfd8aa9f696e607f225f420d9548155..35437024103200e9345d3cb15ee8f1bc17721229 100644
--- a/ui/gfx/BUILD.gn
+++ b/ui/gfx/BUILD.gn
@@ -53,7 +53,6 @@ component("gfx") {
     "color_analysis.cc",
     "color_analysis.h",
     "color_palette.h",
-    "color_space.cc",
     "color_space_win.cc",
     "color_space_win.h",
     "color_transform.cc",
@@ -88,8 +87,6 @@ component("gfx") {
     "gfx_paths.h",
     "half_float.cc",
     "half_float.h",
-    "icc_profile.cc",
-    "icc_profile.h",
     "icc_profile_mac.mm",
     "icc_profile_win.cc",
     "icc_profile_x11.cc",
@@ -165,8 +162,6 @@ component("gfx") {
     "shadow_value.h",
     "skbitmap_operations.cc",
     "skbitmap_operations.h",
-    "skia_color_space_util.cc",
-    "skia_color_space_util.h",
     "switches.cc",
     "switches.h",
     "sys_color_change_listener.cc",
@@ -398,19 +393,25 @@ component("gfx") {
   }
 }
 
-# Depend on this to use color_space.h without pulling in all of gfx.
-source_set("color_space") {
+component("color_space") {
   sources = [
+    "color_space.cc",
     "color_space.h",
+    "icc_profile.cc",
+    "icc_profile.h",
+    "skia_color_space_util.cc",
+    "skia_color_space_util.h",
   ]
-
-  defines = [ "GFX_IMPLEMENTATION" ]
-
   public_deps = [
     ":gfx_export",
     "//base",
     "//skia",
   ]
+  deps = [
+    "//base",
+    "//skia",
+  ]
+  defines = [ "GFX_IMPLEMENTATION" ]

[Nico, 2017/05/19 21:01:50]

This does not lgtm. You now have two components both setting GFX_IMPLEMENTATION,
which means things in deps (like switches_sources, which you added in
https://codereview.chromium.org/2877093002) now have definitions in both .sos.
Please create a dedicated _IMPLEMENTATION file for this, a dedicated _EXPORT
thing for this, and make it depend on the gfx component, or make
switches_sources use your new _EXPORT and make gfx depend on this component.

See
https://chromium.googlesource.com/chromium/src/+/master/docs/component_build.md
for more information on the component build.

 }
 
 # Depend on this to use half_float.h without pulling in all of gfx.