Add User Actions and adding more details to UMA metrics for overscroll navigation

content/browser/web_contents/aura/overscroll_window_delegate.cc

 // Copyright 2015 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/web_contents/aura/overscroll_window_delegate.h"
 
 #include "base/i18n/rtl.h"
 #include "content/browser/frame_host/navigation_controller_impl.h"
 #include "content/browser/frame_host/navigation_entry_impl.h"
 #include "content/browser/renderer_host/overscroll_controller_delegate.h"
@@ skipping 16 matching lines @@
           content::OVERSCROLL_CONFIG_HORIZ_THRESHOLD_START_TOUCHSCREEN)),
       start_threshold_touchpad_(content::GetOverscrollConfig(
           content::OVERSCROLL_CONFIG_HORIZ_THRESHOLD_START_TOUCHPAD)),
       active_start_threshold_(0.f) {
   SetImage(image);
 }
 
 OverscrollWindowDelegate::~OverscrollWindowDelegate() {
 }
 
-void OverscrollWindowDelegate::StartOverscroll() {
+void OverscrollWindowDelegate::StartOverscroll(OverscrollSource source) {
   OverscrollMode old_mode = overscroll_mode_;
   if (delta_x_ > 0)
     overscroll_mode_ = OVERSCROLL_EAST;
   else
     overscroll_mode_ = OVERSCROLL_WEST;
-  delegate_->OnOverscrollModeChange(old_mode, overscroll_mode_);
+  delegate_->OnOverscrollModeChange(old_mode, overscroll_mode_, source);
 }
 
 void OverscrollWindowDelegate::ResetOverscroll() {
   if (overscroll_mode_ == OVERSCROLL_NONE)
     return;
-  delegate_->OnOverscrollModeChange(overscroll_mode_, OVERSCROLL_NONE);
+  delegate_->OnOverscrollModeChange(overscroll_mode_, OVERSCROLL_NONE,
+                                    OverscrollSource::NONE);
   overscroll_mode_ = OVERSCROLL_NONE;
   delta_x_ = 0;
 }
 
 void OverscrollWindowDelegate::CompleteOrResetOverscroll() {
   if (overscroll_mode_ == OVERSCROLL_NONE)
     return;
   int width = delegate_->GetVisibleBounds().width();
   float ratio = (fabs(delta_x_)) / width;
   if (ratio < complete_threshold_ratio_) {
     ResetOverscroll();
     return;
   }
   delegate_->OnOverscrollComplete(overscroll_mode_);
   overscroll_mode_ = OVERSCROLL_NONE;
   delta_x_ = 0;
 }
 
-void OverscrollWindowDelegate::UpdateOverscroll(float delta_x) {
+void OverscrollWindowDelegate::UpdateOverscroll(float delta_x,
+                                                OverscrollSource source) {
   float old_delta_x = delta_x_;
   delta_x_ += delta_x;
   if (overscroll_mode_ == OVERSCROLL_NONE) {
     if (fabs(delta_x_) > active_start_threshold_)
-      StartOverscroll();
+      StartOverscroll(source);
     return;
   }
   if ((old_delta_x < 0 && delta_x_ > 0) || (old_delta_x > 0 && delta_x_ < 0)) {
     ResetOverscroll();
     return;
   }
   delegate_->OnOverscrollUpdate(delta_x_, 0.f);
 }
 
 void OverscrollWindowDelegate::OnKeyEvent(ui::KeyEvent* event) {
   ResetOverscroll();
 }
 
 void OverscrollWindowDelegate::OnMouseEvent(ui::MouseEvent* event) {
   if (!(event->flags() & ui::EF_IS_SYNTHESIZED) &&
       event->type() != ui::ET_MOUSE_CAPTURE_CHANGED) {
     ResetOverscroll();
   }
 }
 
 void OverscrollWindowDelegate::OnScrollEvent(ui::ScrollEvent* event) {
   active_start_threshold_ = start_threshold_touchpad_;
   if (event->type() == ui::ET_SCROLL)
-    UpdateOverscroll(event->x_offset_ordinal());
+    UpdateOverscroll(event->x_offset_ordinal(), OverscrollSource::TOUCHPAD);
   else if (event->type() == ui::ET_SCROLL_FLING_START)
     CompleteOrResetOverscroll();
   else
     ResetOverscroll();
   event->SetHandled();
 }
 
 void OverscrollWindowDelegate::OnGestureEvent(ui::GestureEvent* event) {
   active_start_threshold_ = start_threshold_touchscreen_;
   switch (event->type()) {
     case ui::ET_GESTURE_SCROLL_UPDATE:
-      UpdateOverscroll(event->details().scroll_x());
+      UpdateOverscroll(event->details().scroll_x(),
+                       OverscrollSource::TOUCHSCREEN);
       break;
 
     case ui::ET_GESTURE_SCROLL_END:
       CompleteOrResetOverscroll();
       break;
 
     case ui::ET_SCROLL_FLING_START:
       CompleteOrResetOverscroll();
       break;
 
     case ui::ET_GESTURE_PINCH_BEGIN:
     case ui::ET_GESTURE_PINCH_UPDATE:
     case ui::ET_GESTURE_PINCH_END:
       ResetOverscroll();
       break;
 
     default:
       break;
   }
   event->SetHandled();
 }
 
 }  // namespace content