Creates translate_compact_infobar class, which holds the logic for the new translate UI

chrome/browser/ui/android/infobars/translate_infobar.cc

Index: chrome/browser/ui/android/infobars/translate_infobar.cc
diff --git a/chrome/browser/ui/android/infobars/translate_infobar.cc b/chrome/browser/ui/android/infobars/translate_infobar.cc
index 0ba82095359b813f77301cdea6884ece45cc4c71..2f393dd8e7623ad36eae5de23529d2e58d590b84 100644
--- a/chrome/browser/ui/android/infobars/translate_infobar.cc
+++ b/chrome/browser/ui/android/infobars/translate_infobar.cc
@@ -13,9 +13,10 @@
 #include "base/android/jni_string.h"
 #include "base/android/jni_weak_ref.h"
 #include "base/memory/ptr_util.h"
+#include "chrome/browser/translate/android/translate_utils.h"
 #include "chrome/browser/translate/chrome_translate_client.h"
+#include "chrome/browser/ui/android/infobars/translate_compact_infobar.h"
 #include "components/translate/core/browser/translate_infobar_delegate.h"
-#include "jni/TranslateCompactInfoBar_jni.h"
 #include "jni/TranslateInfoBar_jni.h"
 
 using base::android::JavaParamRef;
@@ -26,7 +27,10 @@ using base::android::ScopedJavaLocalRef;
 
 std::unique_ptr<infobars::InfoBar> ChromeTranslateClient::CreateInfoBar(
     std::unique_ptr<translate::TranslateInfoBarDelegate> delegate) const {
-  return base::MakeUnique<TranslateInfoBar>(std::move(delegate));
+  if (translate::TranslateInfoBarDelegate::IsCompactUIEnabled())
+    return base::MakeUnique<TranslateCompactInfoBar>(std::move(delegate));
+  else
+    return base::MakeUnique<TranslateInfoBar>(std::move(delegate));
 }
 
 
@@ -41,19 +45,10 @@ TranslateInfoBar::~TranslateInfoBar() {
 
 ScopedJavaLocalRef<jobject> TranslateInfoBar::CreateRenderInfoBar(JNIEnv* env) {
   translate::TranslateInfoBarDelegate* delegate = GetDelegate();
-  std::vector<base::string16> languages;
-  std::vector<std::string> codes;
-  languages.reserve(delegate->num_languages());
-  codes.reserve(delegate->num_languages());
-  for (size_t i = 0; i < delegate->num_languages(); ++i) {
-    languages.push_back(delegate->language_name_at(i));
-    codes.push_back(delegate->language_code_at(i));
-  }
-  DCHECK(codes.size() == languages.size());
   base::android::ScopedJavaLocalRef<jobjectArray> java_languages =
-      base::android::ToJavaArrayOfStrings(env, languages);
+      TranslateUtils::GetJavaLanguages(env, delegate);
   base::android::ScopedJavaLocalRef<jobjectArray> java_codes =
-      base::android::ToJavaArrayOfStrings(env, codes);
+      TranslateUtils::GetJavaLanguageCodes(env, delegate);
 
   ScopedJavaLocalRef<jstring> source_language_code =
       base::android::ConvertUTF8ToJavaString(
@@ -63,15 +58,11 @@ ScopedJavaLocalRef<jobject> TranslateInfoBar::CreateRenderInfoBar(JNIEnv* env) {
       base::android::ConvertUTF8ToJavaString(env,
                                              delegate->target_language_code());
 
-  if (translate::TranslateInfoBarDelegate::IsCompactUIEnabled()) {
-    return Java_TranslateCompactInfoBar_create(env);
-  } else {
-    return Java_TranslateInfoBar_show(
-        env, delegate->translate_step(), source_language_code,
-        target_language_code, delegate->ShouldAlwaysTranslate(),
-        ShouldDisplayNeverTranslateInfoBarOnCancel(),
-        delegate->triggered_from_menu(), java_languages, java_codes);
-  }
+  return Java_TranslateInfoBar_show(
+      env, delegate->translate_step(), source_language_code,
+      target_language_code, delegate->ShouldAlwaysTranslate(),
+      ShouldDisplayNeverTranslateInfoBarOnCancel(),
+      delegate->triggered_from_menu(), java_languages, java_codes);
 }
 
 void TranslateInfoBar::ProcessButton(int action) {
@@ -109,13 +100,8 @@ void TranslateInfoBar::SetJavaInfoBar(
     const base::android::JavaRef<jobject>& java_info_bar) {
   InfoBarAndroid::SetJavaInfoBar(java_info_bar);
   JNIEnv* env = base::android::AttachCurrentThread();
-  if (translate::TranslateInfoBarDelegate::IsCompactUIEnabled()) {
-    Java_TranslateCompactInfoBar_setNativePtr(env, java_info_bar,
-                                              reinterpret_cast<intptr_t>(this));
-  } else {
     Java_TranslateInfoBar_setNativePtr(env, java_info_bar,
                                        reinterpret_cast<intptr_t>(this));
-  }
 }
 
 void TranslateInfoBar::ApplyTranslateOptions(