Add "Paste as plain text" into text selection toolbar overflow

content/public/android/java/src/org/chromium/content_public/browser/WebContents.java

Index: content/public/android/java/src/org/chromium/content_public/browser/WebContents.java
diff --git a/content/public/android/java/src/org/chromium/content_public/browser/WebContents.java b/content/public/android/java/src/org/chromium/content_public/browser/WebContents.java
index aab18e37ef7e0c8811568a85bd81593f99433239..28cfef5a5879774bbdf2b41922f837927e57d1a5 100644
--- a/content/public/android/java/src/org/chromium/content_public/browser/WebContents.java
+++ b/content/public/android/java/src/org/chromium/content_public/browser/WebContents.java
@@ -109,6 +109,12 @@ public interface WebContents extends Parcelable {
 
     // TODO (amaralp): Only used in content. Should be moved out of public interface.
     /**
+     * Paste content from the clipboard without format.
+     */
+    void pasteAsPlainText();

[boliu, 2017/05/02 17:31:57]

how easy is it to not add this and make the list of TODOs worse, should just be
a cast?

[aelias_OOO_until_Jul13, 2017/05/02 19:17:38]

I think it would be confusing to plumb this particular one differently from the
others.  When we find a way to factor this out of the public interface, we
should move them all at once.

[Shimi Zhang, 2017/05/03 00:37:17]

When I was trying to implement this, I had the same question, but discussed with
amaralp@, I think we want to defer the refactor.

+
+    // TODO (amaralp): Only used in content. Should be moved out of public interface.
+    /**
      * Replace the selected text with the {@code word}.
      */
     void replace(String word);