Add command_buffer_gles2

gpu/BUILD.gn

Index: gpu/BUILD.gn
diff --git a/gpu/BUILD.gn b/gpu/BUILD.gn
index cf993771214fe341fbe0762c2fc6d3d7e6c076f6..1a0f9bee28d6a0edf4ed9bf39867b8d3d5b3189e 100644
--- a/gpu/BUILD.gn
+++ b/gpu/BUILD.gn
@@ -49,6 +49,45 @@ component("gpu") {
   ]
 }
 
+# GYP version: //gpu/gpu.gyp:command_buffer_gles2
+shared_library("command_buffer_gles2") {
+  sources = [
+    # TODO(hendrikw): Move egl out of gles2_conform_support.
+    "gles2_conform_support/egl/config.cc",
+    "gles2_conform_support/egl/config.h",
+    "gles2_conform_support/egl/display.cc",
+    "gles2_conform_support/egl/display.h",
+    "gles2_conform_support/egl/egl.cc",
+    "gles2_conform_support/egl/surface.cc",
+    "gles2_conform_support/egl/surface.h",
+  ]
+
+  deps = [
+    "//base",
+    "//gpu/command_buffer/client:gles2_c_lib",
+    "//gpu/command_buffer/client:gles2_implementation",
+    "//gpu/command_buffer/service",
+    "//ui/gl:gl",
+  ]
+
+  if (!is_component_build) {

[Nico, 2015/12/21 16:48:46]

Why is this conditional here? This seems wrong at first blush. Why are these
component-build deps only? If you need to do something like this, please add a
comment that explains why.

+    deps += [
+      "//gpu/command_buffer/client:client_sources",
+      "//gpu/command_buffer/client:gles2_cmd_helper_sources",
+    ]
+  }
+
+  defines = [
+    "COMMAND_BUFFER_GLES_LIB_SUPPORT_ONLY",
+    "EGLAPIENTRY=",
+  ]
+  if (current_os == "win") {
+    defines += [ "EGLAPI=__declspec(dllexport)" ]
+  } else {
+    defines += [ "EGLAPI=__attribute__((visibility(\"default\")))" ]
+  }
+}
+
 source_set("test_support") {
   testonly = true
   sources = [