Consolidate all touch/gesture related constants in content

content/browser/renderer_host/input/tap_suppression_controller.cc

 // Copyright 2013 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/input/tap_suppression_controller.h"
 
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "content/browser/renderer_host/input/tap_suppression_controller_client.h"
 
 namespace content {
 
+TapSuppressionController::Config::Config()
+    : enabled(false),
+      max_cancel_to_down_time(base::TimeDelta::FromMilliseconds(180)),
+      max_tap_gap_time(base::TimeDelta::FromMilliseconds(500)) {}
+
 TapSuppressionController::TapSuppressionController(
-    TapSuppressionControllerClient* client)
+    TapSuppressionControllerClient* client,
+    const Config& config)
     : client_(client),
-      state_(TapSuppressionController::NOTHING) {
-}
+      state_(config.enabled ? NOTHING : DISABLED),
+      max_cancel_to_down_time_(config.max_cancel_to_down_time),
+      max_tap_gap_time_(config.max_tap_gap_time) {}
 
 TapSuppressionController::~TapSuppressionController() {}
 
 void TapSuppressionController::GestureFlingCancel() {
   switch (state_) {
+    case DISABLED:
+      break;
     case NOTHING:
     case GFC_IN_PROGRESS:
     case LAST_CANCEL_STOPPED_FLING:
       state_ = GFC_IN_PROGRESS;
       break;
     case TAP_DOWN_STASHED:
       break;
   }
 }
 
 void TapSuppressionController::GestureFlingCancelAck(bool processed) {
   base::TimeTicks event_time = Now();
   switch (state_) {
+    case DISABLED:
     case NOTHING:
       break;
     case GFC_IN_PROGRESS:
       if (processed)
         fling_cancel_time_ = event_time;
       state_ = LAST_CANCEL_STOPPED_FLING;
       break;
     case TAP_DOWN_STASHED:
       if (!processed) {
         TRACE_EVENT0("browser",
                      "TapSuppressionController::GestureFlingCancelAck");
         StopTapDownTimer();
         client_->ForwardStashedTapDown();
         state_ = NOTHING;
       }  // Else waiting for the timer to release the stashed tap down.
       break;
     case LAST_CANCEL_STOPPED_FLING:
       break;
   }
 }
 
 bool TapSuppressionController::ShouldDeferTapDown() {
   base::TimeTicks event_time = Now();
   switch (state_) {
+    case DISABLED:
     case NOTHING:
       return false;
     case GFC_IN_PROGRESS:
       state_ = TAP_DOWN_STASHED;
-      StartTapDownTimer(
-          base::TimeDelta::FromMilliseconds(client_->MaxTapGapTimeInMs()));
+      StartTapDownTimer(max_tap_gap_time_);
       return true;
     case TAP_DOWN_STASHED:
       NOTREACHED() << "TapDown on TAP_DOWN_STASHED state";
       state_ = NOTHING;
       return false;
     case LAST_CANCEL_STOPPED_FLING:
-      if ((event_time - fling_cancel_time_).InMilliseconds()
-          < client_->MaxCancelToDownTimeInMs()) {
+      if ((event_time - fling_cancel_time_) < max_cancel_to_down_time_) {
         state_ = TAP_DOWN_STASHED;
-        StartTapDownTimer(
-            base::TimeDelta::FromMilliseconds(client_->MaxTapGapTimeInMs()));
+        StartTapDownTimer(max_tap_gap_time_);
         return true;
       } else {
         state_ = NOTHING;
         return false;
       }
   }
   NOTREACHED() << "Invalid state";
   return false;
 }
 
 bool TapSuppressionController::ShouldSuppressTapEnd() {
   switch (state_) {
+    case DISABLED:
     case NOTHING:
     case GFC_IN_PROGRESS:
       return false;
     case TAP_DOWN_STASHED:
       state_ = NOTHING;
       StopTapDownTimer();
       client_->DropStashedTapDown();
       return true;
     case LAST_CANCEL_STOPPED_FLING:
       NOTREACHED() << "Invalid tap end on LAST_CANCEL_STOPPED_FLING state";
   }
   return false;
 }
 
 base::TimeTicks TapSuppressionController::Now() {
   return base::TimeTicks::Now();
 }
 
 void TapSuppressionController::StartTapDownTimer(const base::TimeDelta& delay) {
   tap_down_timer_.Start(FROM_HERE, delay, this,
                         &TapSuppressionController::TapDownTimerExpired);
 }
 
 void TapSuppressionController::StopTapDownTimer() {
   tap_down_timer_.Stop();
 }
 
 void TapSuppressionController::TapDownTimerExpired() {
   switch (state_) {
+    case DISABLED:
     case NOTHING:
+      NOTREACHED() << "Timer fired on invalid state.";
+      break;
     case GFC_IN_PROGRESS:
     case LAST_CANCEL_STOPPED_FLING:
       NOTREACHED() << "Timer fired on invalid state.";
       state_ = NOTHING;
       break;
     case TAP_DOWN_STASHED:
       TRACE_EVENT0("browser",
                    "TapSuppressionController::TapDownTimerExpired");
       client_->ForwardStashedTapDown();
       state_ = NOTHING;
       break;
   }
 }
 
 }  // namespace content