Expose native, desktop and mobile gesture detection defaults

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 199 matching lines @@
   DCHECK(content_view_core);
   int tap_timeout_ms = gfx::ViewConfiguration::GetTapTimeoutInMs();
   int touch_slop_pixels = gfx::ViewConfiguration::GetTouchSlopInPixels();
   return make_scoped_ptr(new TouchSelectionController(
       client,
       base::TimeDelta::FromMilliseconds(tap_timeout_ms),
       touch_slop_pixels / content_view_core->GetDpiScale()));
 }
 
 ui::GestureProvider::Config CreateGestureProviderConfig() {
-  ui::GestureProvider::Config config = ui::DefaultGestureProviderConfig();
+  ui::GestureProvider::Config config = ui::GetGestureProviderConfig(
+      ui::GestureProviderConfigType::CURRENT_PLATFORM);
   config.disable_click_delay =
       base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kDisableClickDelay);
   return config;
 }
 
 bool HasFixedPageScale(const cc::CompositorFrameMetadata& frame_metadata) {
   return frame_metadata.min_page_scale_factor ==
          frame_metadata.max_page_scale_factor;
 }
@@ skipping 475 matching lines @@
       selection_controller_->WillHandleTouchEvent(event))
     return true;
 
   if (gesture_text_selector_.OnTouchEvent(event))
     return true;
 
   if (!gesture_provider_.OnTouchEvent(event))
     return false;
 
   if (host_->ShouldForwardTouchEvent()) {
-    blink::WebTouchEvent web_event = CreateWebTouchEventFromMotionEvent(event);
+    bool event_may_cause_scrolling =
+        gesture_provider_.LastTouchEventDidGenerateScroll();
+    blink::WebTouchEvent web_event =
+        CreateWebTouchEventFromMotionEvent(event, event_may_cause_scrolling);
     host_->ForwardTouchEventWithLatencyInfo(web_event,
                                             CreateLatencyInfo(web_event));
   } else {
     const bool event_consumed = false;
     gesture_provider_.OnTouchEventAck(event_consumed);
   }
 
   // Send a proactive BeginFrame on the next vsync to reduce latency.
   // This is good enough as long as the first touch event has Begin semantics
   // and the actual scroll happens on the next vsync.
@@ skipping 1073 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