Single character is coming in search box after searching empty selection

content/browser/renderer_host/render_widget_host_view_android.cc

 // Copyright (c) 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/renderer_host/render_widget_host_view_android.h"
 
 #include <android/bitmap.h>
 
 #include "base/android/build_info.h"
 #include "base/basictypes.h"
@@ skipping 700 matching lines @@
 }
 
 void RenderWidgetHostViewAndroid::SelectionChanged(const base::string16& text,
                                                    size_t offset,
                                                    const gfx::Range& range) {
   RenderWidgetHostViewBase::SelectionChanged(text, offset, range);
 
   if (selection_controller_)
     selection_controller_->OnSelectionEmpty(text.empty());
 
-  if (text.empty() || range.is_empty() || !content_view_core_)
+  if (!content_view_core_)
     return;
+  if (range.is_empty()) {
+    content_view_core_->OnSelectionChanged("");
+    return;
+  }
+
+  DCHECK(!text.empty());
   size_t pos = range.GetMin() - offset;
   size_t n = range.length();
 
   DCHECK(pos + n <= text.length()) << "The text can not fully cover range.";
   if (pos >= text.length()) {
     NOTREACHED() << "The text can not cover range.";
     return;
   }
 
   std::string utf8_selection = base::UTF16ToUTF8(text.substr(pos, n));
@@ skipping 1009 matching lines @@
   results->orientationAngle = display.RotationAsDegree();
   results->orientationType =
       RenderWidgetHostViewBase::GetOrientationTypeForMobile(display);
   gfx::DeviceDisplayInfo info;
   results->depth = info.GetBitsPerPixel();
   results->depthPerComponent = info.GetBitsPerComponent();
   results->isMonochrome = (results->depthPerComponent == 0);
 }
 
 } // namespace content