Allow scrolling a page with selection after long-press on whitespace

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 1596 matching lines @@
         break;
 
       case blink::WebInputEvent::GestureTap:
         if (selection_controller_->WillHandleTapEvent(
                 gfx::PointF(gesture_event.x, gesture_event.y),
                 gesture_event.data.tap.tapCount)) {
           return INPUT_EVENT_ACK_STATE_CONSUMED;
         }
         break;
 
+      case blink::WebInputEvent::GestureScrollBegin:
+        selection_controller_->OnScrollBeginEvent();
+        break;
+
       default:
         break;
     }
   }
 
   if (overscroll_controller_ &&
       blink::WebInputEvent::isGestureEventType(input_event.type) &&
       overscroll_controller_->WillHandleGestureEvent(
           static_cast<const blink::WebGestureEvent&>(input_event))) {
     return INPUT_EVENT_ACK_STATE_CONSUMED;
@@ skipping 430 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