IME for Mus: Add ui.mojom.CompositionText and its struct traits.

services/ui/ime/test_ime_driver/test_ime_driver.cc

Index: services/ui/ime/test_ime_driver/test_ime_driver.cc
diff --git a/services/ui/ime/test_ime_driver/test_ime_driver.cc b/services/ui/ime/test_ime_driver/test_ime_driver.cc
index 3d47dc084f0f99bb36caabaf4bbe2f72290460ab..0c7355689bb127f9ca9309513ac3ec13590be0d3 100644
--- a/services/ui/ime/test_ime_driver/test_ime_driver.cc
+++ b/services/ui/ime/test_ime_driver/test_ime_driver.cc
@@ -4,7 +4,7 @@
 
 #include "services/ui/ime/test_ime_driver/test_ime_driver.h"
 
-#include "services/ui/public/interfaces/ime.mojom.h"
+#include "services/ui/public/interfaces/ime/ime.mojom.h"
 
 namespace ui {
 namespace test {
@@ -25,11 +25,7 @@ class TestInputMethod : public mojom::InputMethod {
     DCHECK(key_event->IsKeyEvent());
 
     if (key_event->AsKeyEvent()->is_char()) {
-      mojom::CompositionEventPtr composition_event =
-          mojom::CompositionEvent::New();
-      composition_event->type = mojom::CompositionEventType::INSERT_CHAR;
-      composition_event->key_event = std::move(key_event);
-      client_->OnCompositionEvent(std::move(composition_event));
+      client_->InsertChar(std::move(key_event));
       callback.Run(true);
     } else {
       callback.Run(false);