Add support for Android spellcheck menu in Chrome/WebViews

content/public/android/java/res/values-v17/styles.xml

Index: content/public/android/java/res/values-v17/styles.xml
diff --git a/content/public/android/java/res/values-v17/styles.xml b/content/public/android/java/res/values-v17/styles.xml
index 58d8ed49117c7ce361ab1ee6d4e42373ef058201..a9d163b231b2b4f1ecd996e5810af118ccb1f2f6 100644
--- a/content/public/android/java/res/values-v17/styles.xml
+++ b/content/public/android/java/res/values-v17/styles.xml
@@ -16,4 +16,28 @@
     <style name="SelectActionMenuWebSearch">
         <item name="android:icon">@drawable/ic_search</item>
     </style>
+    <style name="TextSuggestionButton">
+        <item name="android:drawablePadding">8dip</item>
+        <!-- v21 uses sans-serif-medium -->

[Theresa, 2017/07/18 15:37:51]

If v21 uses sans-serif-medium then you should probably be using RobotStyleMedium
to achieve a similar visual effect pre and post L.

[rlanday, 2017/07/19 00:23:55]

I'd love to get this to match, but your suggestion didn't seem to change the
appearance at all.

[Theresa, 2017/07/19 15:10:50]

It would only change the appearance on Pre-L devices. Will you grab updated
screenshots on pre-L and L+ devices?

RobotoMediumStyle is used to emulate sans-serif-medium on pre-L devices using
sans-serif + bold text style.

[rlanday, 2017/07/19 22:03:43]

Ok, done. Updated screenshots here:
https://docs.google.com/document/d/1_HPiXt2ufXT8Qm5yWXKK0zgPkQNZbCSVzt-_N0LFj...

I have a CL up to move RobotoMediumStyle out of chrome/android so we can use it
in content:
https://chromium-review.googlesource.com/c/578477/

I've also included these changes in this CL so the try bots build cleanly, I
will remove them once that CL lands.

+        <item name="android:fontFamily">sans-serif</item>
+        <item name="android:gravity">start|center_vertical</item>
+        <item name="android:layout_gravity">start|center_vertical</item>
+        <item name="android:layout_height">48dip</item>

[Theresa, 2017/07/18 15:37:51]

nit: Same comment about dip here

+        <item name="android:layout_width">match_parent</item>
+        <item name="android:paddingBottom">8dip</item>
+        <item name="android:paddingEnd">16dip</item>
+        <item name="android:paddingStart">16dip</item>
+        <item name="android:paddingTop">8dip</item>
+        <item name="android:singleLine">true</item>
+        <!-- v21 uses android:attr/colorAccent -->
+        <item name="android:textColor">@color/google_blue_500</item>
+        <item name="android:textAllCaps">true</item>
+        <item name="android:textSize">14sp</item>
+    </style>
+    <style name="TextSuggestionWindowContainer">
+      <item name="android:layout_width">match_parent</item>
+      <item name="android:layout_height">wrap_content</item>
+      <item name="android:layout_margin">@dimen/text_suggestion_window_container_margin</item>
+      <item name="android:orientation">vertical</item>
+    </style>
 </resources>