Additional update on Pepper IME API and boilerplate thunk/proxy implementation.

ppapi/thunk/ppb_input_event_thunk.cc

Index: ppapi/thunk/ppb_input_event_thunk.cc
diff --git a/ppapi/thunk/ppb_input_event_thunk.cc b/ppapi/thunk/ppb_input_event_thunk.cc
index 6028c6e9e6b7e166805b45ddde493eda819e2408..7c8820a883c562031e9a8ddf6ccf79897f541f78 100644
--- a/ppapi/thunk/ppb_input_event_thunk.cc
+++ b/ppapi/thunk/ppb_input_event_thunk.cc
@@ -271,6 +271,64 @@ const PPB_KeyboardInputEvent g_ppb_keyboard_input_event_thunk = {
   &GetCharacterText
 };
 
+// Composition -----------------------------------------------------------------
+
+PP_Bool IsIMEInputEvent(PP_Resource resource) {
+  if (!IsInputEvent(resource))
+    return PP_FALSE;  // Prevent warning log in GetType.
+  PP_InputEvent_Type type = GetType(resource);
+  return PP_FromBool(type == PP_INPUTEVENT_TYPE_IME_COMPOSITION_START ||
+                     type == PP_INPUTEVENT_TYPE_IME_COMPOSITION_UPDATE ||
+                     type == PP_INPUTEVENT_TYPE_IME_COMPOSITION_END ||
+                     type == PP_INPUTEVENT_TYPE_IME_TEXT);
+}
+
+PP_Var GetIMEText(PP_Resource ime_event) {
+  return GetCharacterText(ime_event);
+}
+
+uint32_t GetIMESegmentNumber(PP_Resource ime_event) {
+  EnterInputEvent enter(ime_event, true);
+  if (enter.failed())
+    return 0;
+  return enter.object()->GetIMESegmentNumber();
+}
+
+uint32_t GetIMESegmentOffset(PP_Resource ime_event, uint32_t index) {
+  EnterInputEvent enter(ime_event, true);
+  if (enter.failed())
+    return 0;
+  return enter.object()->GetIMESegmentOffset(index);
+}
+
+int32_t GetIMETargetSegment(PP_Resource ime_event) {
+  EnterInputEvent enter(ime_event, true);
+  if (enter.failed())
+    return -1;
+  return enter.object()->GetIMETargetSegment();
+}
+
+void GetIMESelection(PP_Resource ime_event, uint32_t* start, uint32_t* end) {
+  EnterInputEvent enter(ime_event, true);
+  if (enter.failed()) {
+    if (start)
+      *start = 0;
+    if (end)
+      *end = 0;
+    return;
+  }
+  enter.object()->GetIMESelection(start, end);
+}
+
+const PPB_IMEInputEvent_Dev g_ppb_ime_input_event_thunk = {
+  &IsIMEInputEvent,
+  &GetIMEText,
+  &GetIMESegmentNumber,
+  &GetIMESegmentOffset,
+  &GetIMETargetSegment,
+  &GetIMESelection
+};
+
 }  // namespace
 
 const PPB_InputEvent* GetPPB_InputEvent_Thunk() {
@@ -293,5 +351,9 @@ const PPB_WheelInputEvent* GetPPB_WheelInputEvent_Thunk() {
   return &g_ppb_wheel_input_event_thunk;
 }
 
+const PPB_IMEInputEvent_Dev* GetPPB_IMEInputEvent_Dev_Thunk() {
+  return &g_ppb_ime_input_event_thunk;
+}
+
 }  // namespace thunk
 }  // namespace ppapi