[Android] Make enhanced bookmark editing UI more straightforward.

chrome/android/java/src/org/chromium/chrome/browser/widget/EmptyAlertEditText.java

Index: chrome/android/java/src/org/chromium/chrome/browser/widget/EmptyAlertEditText.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/widget/EmptyAlertEditText.java b/chrome/android/java/src/org/chromium/chrome/browser/widget/EmptyAlertEditText.java
index 9fe5e1a2494e2550a78b3c4e092dc09208ed478f..286bb1bb29e6c64336ab05a7e75502916f00fa35 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/widget/EmptyAlertEditText.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/widget/EmptyAlertEditText.java
@@ -43,7 +43,11 @@ public class EmptyAlertEditText extends AppCompatEditText {
 
             @Override
             public void afterTextChanged(Editable s) {
-                if (s.toString().trim().length() != 0 && getError() != null) setError(null);
+                if (isValid()) {
+                    if (getError() != null) setError(null);
+                } else {
+                    setError(mAlertMessage);
+                }
             }
         });
     }
@@ -63,14 +67,9 @@ public class EmptyAlertEditText extends AppCompatEditText {
     }
 
     /**
-     * Checks whether the content is empty. If empty, an alert message will be shown.
-     * @return Whether the content is empty.
+     * @return Whether the content is valid.
      */
-    public boolean validate() {
-        if (getTrimmedText().length() == 0) {
-            setError(mAlertMessage);
-            return false;
-        }
-        return true;
+    public boolean isValid() {
+        return getTrimmedText().length() > 0;
     }
 }