Explicit Language Ask minor UI polish

This adds a bit of padding after the checkboxes and makes entire
rows clickable.

Bug: 887678
Change-Id: I89d6d7f1901170d6178b3b5e0fce228b3d584d00
Reviewed-on: https://chromium-review.googlesource.com/1252524Reviewed-by: Theresa <twellington@chromium.org>
Commit-Queue: anthonyvd <anthonyvd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#595501}

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

@@ -16,6 +16,7 @@
     <CheckBox
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
+        android:paddingEnd="@dimen/explicit_ask_checkbox_end_padding"
         android:id="@+id/language_ask_checkbox"
         android:layout_alignBaseline="@+id/ui_language_representation" />
 

chrome/android/java/res/values/dimens.xml

@@ -550,4 +550,7 @@
     <dimen name="navigation_popup_default_padding">16dp</dimen>
     <dimen name="navigation_popup_top_padding">8dp</dimen>
     <dimen name="navigation_popup_favicon_bg_size">36dp</dimen>
+
+    <!-- Explicit Language Ask Prompt dimensions -->
+    <dimen name="explicit_ask_checkbox_end_padding">4dp</dimen>
 </resources>

chrome/android/java/src/org/chromium/chrome/browser/language/LanguageAskPrompt.java

@@ -43,7 +43,8 @@ public class LanguageAskPrompt implements ModalDialogView.Controller {
         }
     }
 
-    private class LanguageAskPromptRowViewHolder extends ViewHolder {
+    private class LanguageAskPromptRowViewHolder
+            extends ViewHolder implements View.OnClickListener {
         private TextView mLanguageNameTextView;
         private TextView mNativeNameTextView;
         private CheckBox mCheckbox;
@@ -52,6 +53,7 @@ public class LanguageAskPrompt implements ModalDialogView.Controller {
 
         LanguageAskPromptRowViewHolder(View view) {
             super(view);
+            view.setOnClickListener(this);
             mLanguageNameTextView =
                     ((TextView) itemView.findViewById(R.id.ui_language_representation));
             mNativeNameTextView =
@@ -69,6 +71,11 @@ public class LanguageAskPrompt implements ModalDialogView.Controller {
             });
         }
 
+        @Override
+        public void onClick(View v) {
+            mCheckbox.setChecked(!mCheckbox.isChecked());
+        }
+
         /**
          * Sets the text in the TextView children of this row to |languageName| and |nativeName|
          * respectively.