Expose onCheckIsTextEditor correctly through WebView object

View#onCheckIsTextEditor tells the framework whether the view object can
edit text or not.

We need to do plumbing work to ensure that WebView#onCheckIsTextEditor()
returns a correct value. This is a chromium side change.

Bug: 819420, b/74199870
Change-Id: Ifd93421b855f346d820af4d221863ce83b2e79e5
Reviewed-on: https://chromium-review.googlesource.com/952217
Commit-Queue: Changwan Ryu <changwan@chromium.org>
Reviewed-by: Bo <boliu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#541296}

android_webview/glue/java/src/com/android/webview/chromium/WebViewChromium.java

@@ -1516,7 +1516,7 @@ class WebViewChromium implements WebViewProvider, WebViewProvider.ScrollDelegate
 
     @Override
     public TextClassifier getTextClassifier() {
-        return (TextClassifier) mAwContents.getTextClassifier();
+        return mAwContents.getTextClassifier();
     }
 
     @Override
@@ -2136,6 +2136,23 @@ class WebViewChromium implements WebViewProvider, WebViewProvider.ScrollDelegate
         mAwContents.onFinishTemporaryDetach();
     }
 
+    // TODO(changwan): override WebViewProvider.ViewDelegate method once the framework change has
+    // rolled in.
+    // (not called in O-MR1 and below)
+    // @Override
+    public boolean onCheckIsTextEditor() {
+        mFactory.startYourEngines(false);
+        if (checkNeedsPost()) {
+            return mFactory.runOnUiThreadBlocking(new Callable<Boolean>() {
+                @Override
+                public Boolean call() {
+                    return onCheckIsTextEditor();
+                }
+            });
+        }
+        return mAwContents.onCheckIsTextEditor();
+    }
+
     // WebViewProvider.ScrollDelegate implementation ----------------------------------------------
 
     @Override

android_webview/java/src/org/chromium/android_webview/AwContents.java

@@ -1965,6 +1965,13 @@ public class AwContents implements SmartClipProvider {
         mAwViewMethods.computeScroll();
     }
 
+    /**
+     * @see View#onCheckIsTextEditor()
+     */
+    public boolean onCheckIsTextEditor() {
+        return mAwViewMethods.onCheckIsTextEditor();
+    }
+
     /**
      * @see android.webkit.WebView#stopLoading()
      */
@@ -3571,6 +3578,13 @@ public class AwContents implements SmartClipProvider {
             nativeOnComputeScroll(mNativeAwContents, AnimationUtils.currentAnimationTimeMillis());
         }
 
+        @Override
+        public boolean onCheckIsTextEditor() {
+            return isDestroyedOrNoOperation(NO_WARN)
+                    ? false
+                    : ImeAdapter.fromWebContents(mWebContents).onCheckIsTextEditor();
+        }
+
         @Override
         public AccessibilityNodeProvider getAccessibilityNodeProvider() {
             return isDestroyedOrNoOperation(WARN)

android_webview/java/src/org/chromium/android_webview/AwViewMethods.java

@@ -162,6 +162,11 @@ interface AwViewMethods {
      */
     void computeScroll();
 
+    /**
+     * @see android.view.View#onCheckIsTextEditor
+     */
+    boolean onCheckIsTextEditor();
+
     /**
      * @see android.view.View#getAccessibilityNodeProvider
      */

android_webview/java/src/org/chromium/android_webview/NullAwViewMethods.java

@@ -176,6 +176,11 @@ class NullAwViewMethods implements AwViewMethods {
         // Intentional no-op.
     }
 
+    @Override
+    public boolean onCheckIsTextEditor() {
+        return false;
+    }
+
     @Override
     public AccessibilityNodeProvider getAccessibilityNodeProvider() {
         return null;