Gate Android drag and drop feature with a flag.

content/browser/android/content_view_core_impl.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/android/content_view_core_impl.h"
 
 #include <stddef.h>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
@@ skipping 40 matching lines @@
 #include "content/public/common/content_client.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/menu_item.h"
 #include "content/public/common/user_agent.h"
 #include "jni/ContentViewCore_jni.h"
 #include "jni/DragEvent_jni.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "ui/android/view_android.h"
 #include "ui/android/window_android.h"
 #include "ui/base/clipboard/clipboard.h"
+#include "ui/base/ui_base_switches_util.h"
 #include "ui/events/android/motion_event_android.h"
 #include "ui/events/blink/blink_event_util.h"
 #include "ui/events/event_utils.h"
 #include "ui/gfx/android/java_bitmap.h"
 #include "ui/gfx/geometry/point_conversions.h"
 #include "ui/gfx/geometry/size_conversions.h"
 #include "ui/gfx/geometry/size_f.h"
 
 using base::android::AttachCurrentThread;
 using base::android::ConvertJavaStringToUTF16;
@@ skipping 1398 matching lines @@
                                               const JavaParamRef<jobject>& jobj,
                                               jboolean opaque) {
   if (GetRenderWidgetHostViewAndroid()) {
     if (opaque)
       GetRenderWidgetHostViewAndroid()->SetBackgroundColorToDefault();
     else
       GetRenderWidgetHostViewAndroid()->SetBackgroundColor(SK_ColorTRANSPARENT);
   }
 }
 
+bool ContentViewCoreImpl::IsTouchDragDropEnabled(
+    JNIEnv* env,
+    const base::android::JavaParamRef<jobject>& jobj) {
+  return switches::IsTouchDragDropEnabled();
+}
+
 void ContentViewCoreImpl::OnDragEvent(
     JNIEnv* env,
     const base::android::JavaParamRef<jobject>& jobj,
     jint action,
     jint x,
     jint y,
     jint screen_x,
     jint screen_y,
     const base::android::JavaParamRef<jobjectArray>& j_mimeTypes,
     const base::android::JavaParamRef<jstring>& j_content) {
@@ skipping 153 matching lines @@
     return ScopedJavaLocalRef<jobject>();
 
   return view->GetJavaObject();
 }
 
 bool RegisterContentViewCore(JNIEnv* env) {
   return RegisterNativesImpl(env) && JNI_DragEvent::RegisterNativesImpl(env);
 }
 
 }  // namespace content