[Signin] Update order of buttons in dialog for merging data

The first one should always be the default one.

Updated switch case: http://screen/PTLfmU9H7h0.png

BUG=660418

Review-Url: https://codereview.chromium.org/2614973002
Cr-Commit-Position: refs/heads/master@{#442977}

chrome/android/java/res/layout/confirm_import_sync_data.xml

@@ -8,14 +8,15 @@
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:overScrollMode="ifContentScrolls"
+    android:paddingTop="25dp"
     android:paddingEnd="25dp"
     android:paddingStart="25dp">
 
     <LinearLayout
+        android:id="@+id/sync_import_data_content"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:orientation="vertical"
-        android:paddingTop="8dp">
+        android:orientation="vertical">
 
         <TextView
             android:id="@+id/sync_import_data_prompt"

chrome/android/java/src/org/chromium/chrome/browser/signin/ConfirmImportSyncDataDialog.java

@@ -13,6 +13,7 @@ import android.support.v7.app.AlertDialog;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.View.OnClickListener;
+import android.widget.LinearLayout;
 import android.widget.TextView;
 
 import org.chromium.base.VisibleForTesting;
@@ -159,8 +160,15 @@ public class ConfirmImportSyncDataDialog extends DialogFragment
             }
         }
 
+        if (importSyncType == ImportSyncType.SWITCHING_SYNC_ACCOUNTS) {
+            // Re-order the buttons so that Import Data is last and Don't Import (the default) is
+            // at the top.
+            LinearLayout layout = (LinearLayout) v.findViewById(R.id.sync_import_data_content);
+            layout.removeView(mConfirmImportOption);
+            layout.addView(mConfirmImportOption);
+        }
+
         return new AlertDialog.Builder(getActivity(), R.style.AlertDialogTheme)
-                .setTitle(R.string.sync_import_data_title)
                 .setPositiveButton(R.string.continue_button, this)
                 .setNegativeButton(R.string.cancel, this)
                 .setView(v)

chrome/android/java/strings/android_chrome_strings.grd

@@ -1184,9 +1184,6 @@ To obtain new licenses, connect to the internet and play your downloaded content
       <message name="IDS_SYNC_LOADING" desc="Preference title to let the user change their encryption password. [CHAR-LIMIT=20]">
         Loading…
       </message>
-      <message name="IDS_SYNC_IMPORT_DATA_TITLE" desc="Preference title of screen to let user choose to switch sync accounts. [CHAR-LIMIT=24]">
-        Import data?
-      </message>
       <message name="IDS_SYNC_IMPORT_DATA_PROMPT" desc="Prompt for the user to choose how they want to handle their existing sync data">
          You have bookmarks, history, passwords, and other settings from <ph name ="FROM_ACCOUNT">%1$s<ex>johndoe@old.com</ex></ph>.
       </message>