Android: add EnhancedSelectionInsertionHandle to content feature list

For easier control on the feature. Enabled by default.

Bug: 798017
Change-Id: Ia87870c822c9086e92083a0f9deb23a7bfe2a7c0
Reviewed-on: https://chromium-review.googlesource.com/865560Reviewed-by: Bo <boliu@chromium.org>
Commit-Queue: Shimi Zhang <ctzsm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#529133}

content/browser/android/content_feature_list.cc

@@ -22,7 +22,7 @@ namespace {
 // this array may either refer to features defined in the header of this file or
 // in other locations in the code base (e.g. content_features.h).
 const base::Feature* kFeaturesExposedToJava[] = {
-    &kRequestUnbufferedDispatch,
+    &kEnhancedSelectionInsertionHandle, &kRequestUnbufferedDispatch,
 };
 
 const base::Feature* FindFeatureExposedToJava(const std::string& feature_name) {
@@ -38,6 +38,8 @@ const base::Feature* FindFeatureExposedToJava(const std::string& feature_name) {
 }  // namespace
 
 // Alphabetical:
+const base::Feature kEnhancedSelectionInsertionHandle{
+    "EnhancedSelectionInsertionHandle", base::FEATURE_ENABLED_BY_DEFAULT};
 const base::Feature kRequestUnbufferedDispatch{
     "RequestUnbufferedDispatch", base::FEATURE_ENABLED_BY_DEFAULT};
 

content/browser/android/content_feature_list.h

@@ -11,6 +11,7 @@ namespace content {
 namespace android {
 
 // Alphabetical:
+extern const base::Feature kEnhancedSelectionInsertionHandle;
 extern const base::Feature kRequestUnbufferedDispatch;
 
 }  // namespace android

content/public/android/java/src/org/chromium/content/browser/ContentFeatureList.java

@@ -30,6 +30,8 @@ public abstract class ContentFeatureList {
     }
 
     // Alphabetical:
+    public static final String ENHANCED_SELECTION_INSERTION_HANDLE =
+            "EnhancedSelectionInsertionHandle";
     public static final String REQUEST_UNBUFFERED_DISPATCH = "RequestUnbufferedDispatch";
 
     private static native boolean nativeIsEnabled(String featureName);