Fix clang build break

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 254208d60e40dd3e5ce6464f9beeb00000f4521c..0c00e54d0f03a6236137d2a9366efe2faafd3e29 100644
--- a/chrome/browser/chromeos/input_method/input_method_engine.cc
+++ b/chrome/browser/chromeos/input_method/input_method_engine.cc
@@ -19,6 +19,24 @@ const char* kExtensionImePrefix = "_ext_ime_";
 const char* kErrorNotActive = "IME is not active";
 const char* kErrorWrongContext = "Context is not active";
 
+InputMethodEngine::KeyboardEvent::KeyboardEvent() {
+}
+
+InputMethodEngine::KeyboardEvent::~KeyboardEvent() {
+}
+
+InputMethodEngine::MenuItem::MenuItem() {
+}
+
+InputMethodEngine::MenuItem::~MenuItem() {
+}
+
+InputMethodEngine::Candidate::Candidate() {
+}
+
+InputMethodEngine::Candidate::~Candidate() {
+}
+
 InputMethodEngine::Observer::~Observer() {
 }