Create //ui/base/ime:text_input_base target.

ui/base/ime/BUILD.gn

Index: ui/base/ime/BUILD.gn
diff --git a/ui/base/ime/BUILD.gn b/ui/base/ime/BUILD.gn
index 9cf4606bed3f692b7a65af969c338fe83311851c..b54f15c55f518cd7ca020870ddf97a25156dddf6 100644
--- a/ui/base/ime/BUILD.gn
+++ b/ui/base/ime/BUILD.gn
@@ -5,6 +5,14 @@
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 
+source_set("text_input_types") {

[sadrul, 2016/01/26 17:50:38]

I think you want group() here, instead of source_set()

[kylechar, 2016/01/26 17:58:34]

Discussed in person. Will leave it as source_set.

[spang, 2016/01/26 18:00:09]

group() doesn't have have sources = [...]

I think it has to be static_library or source_set, but I'm not sure it matters
which. I cannot think of any difference with only headers in "sources".

+  sources = [
+    "text_input_flags.h",
+    "text_input_mode.h",
+    "text_input_type.h",
+  ]
+}
+
 component("ime") {
   output_name = "ui_base_ime"
   sources = [
@@ -85,7 +93,6 @@ component("ime") {
     "mock_input_method.h",
     "text_input_client.cc",
     "text_input_client.h",
-    "text_input_type.h",
     "ui_base_ime_export.h",
     "win/imm32_manager.cc",
     "win/imm32_manager.h",
@@ -111,6 +118,10 @@ component("ime") {
     "//url",
   ]
 
+  public_deps = [
+    ":text_input_types",
+  ]
+
   if (!use_aura || (!is_linux && !use_ozone)) {
     sources -= [
       "input_method_auralinux.cc",