ime: Move test-only code in ui/base/ime/chromeos into test_support.

They are currently compiled with the production code even though they
are never used in production.

Bug: 1148157
Change-Id: Ic115540344a42401c40601fd6167d33d2a8362d6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2539217Reviewed-by: My Nguyen <myy@chromium.org>
Commit-Queue: Darren Shen <shend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#827693}

ui/base/BUILD.gn

@@ -783,6 +783,16 @@ static_library("test_support") {
     sources += [
       "ime/chromeos/input_method_allowlist.cc",
       "ime/chromeos/input_method_allowlist.h",
+      "ime/chromeos/mock_component_extension_ime_manager.cc",
+      "ime/chromeos/mock_component_extension_ime_manager.h",
+      "ime/chromeos/mock_component_extension_ime_manager_delegate.cc",
+      "ime/chromeos/mock_component_extension_ime_manager_delegate.h",
+      "ime/chromeos/mock_ime_candidate_window_handler.cc",
+      "ime/chromeos/mock_ime_candidate_window_handler.h",
+      "ime/chromeos/mock_ime_engine_handler.cc",
+      "ime/chromeos/mock_ime_engine_handler.h",
+      "ime/chromeos/mock_ime_input_context_handler.cc",
+      "ime/chromeos/mock_ime_input_context_handler.h",
       "ime/chromeos/mock_input_method_manager.cc",
       "ime/chromeos/mock_input_method_manager.h",
     ]

ui/base/ime/chromeos/BUILD.gn

@@ -42,16 +42,6 @@ component("chromeos") {
     "input_method_manager.h",
     "input_method_util.cc",
     "input_method_util.h",
-    "mock_component_extension_ime_manager.cc",
-    "mock_component_extension_ime_manager.h",
-    "mock_component_extension_ime_manager_delegate.cc",
-    "mock_component_extension_ime_manager_delegate.h",
-    "mock_ime_candidate_window_handler.cc",
-    "mock_ime_candidate_window_handler.h",
-    "mock_ime_engine_handler.cc",
-    "mock_ime_engine_handler.h",
-    "mock_ime_input_context_handler.cc",
-    "mock_ime_input_context_handler.h",
   ]
 
   defines = [ "IS_UI_BASE_IME_CHROMEOS_IMPL" ]