Implement chrome.input.ime.setComposition/commitText API.

chrome/browser/chromeos/input_method/input_method_engine.cc

Index: chrome/browser/chromeos/input_method/input_method_engine.cc
diff --git a/chrome/browser/chromeos/input_method/input_method_engine.cc b/chrome/browser/chromeos/input_method/input_method_engine.cc
index b9859db24ba612f3b8ff8ceced68b4a4a5083536..d4b95e40f6588486491e76a569693a053ea359f3 100644
--- a/chrome/browser/chromeos/input_method/input_method_engine.cc
+++ b/chrome/browser/chromeos/input_method/input_method_engine.cc
@@ -344,4 +344,27 @@ void InputMethodEngine::MenuItemToProperty(
   // TODO(nona): Support item.children.
 }
 
+void InputMethodEngine::UpdateComposition(
+    const ui::CompositionText& composition_text,
+    uint32_t cursor_pos,
+    bool is_visible) {
+  ui::IMEInputContextHandlerInterface* input_context =
+      ui::IMEBridge::Get()->GetInputContextHandler();
+  if (input_context)
+    input_context->UpdateCompositionText(composition_text, cursor_pos,
+                                         is_visible);
+}
+
+void InputMethodEngine::CommitTextToInputContext(int context_id,
+                                                 const std::string& text) {
+  ui::IMEBridge::Get()->GetInputContextHandler()->CommitText(text);
+
+  // Records histograms for committed characters.
+  if (!composition_text_->text.empty()) {
+    UMA_HISTOGRAM_CUSTOM_COUNTS("InputMethod.CommitLength", text.length(), 1,
+                                25, 25);
+    composition_text_.reset(new ui::CompositionText());
+  }
+}
+
 }  // namespace chromeos