Enable pinch-zoom telemetry on Mac

content/browser/renderer_host/input/synthetic_touchscreen_pinch_gesture.cc

Index: content/browser/renderer_host/input/synthetic_touchscreen_pinch_gesture.cc
diff --git a/content/browser/renderer_host/input/synthetic_pinch_gesture.cc b/content/browser/renderer_host/input/synthetic_touchscreen_pinch_gesture.cc
similarity index 76%
copy from content/browser/renderer_host/input/synthetic_pinch_gesture.cc
copy to content/browser/renderer_host/input/synthetic_touchscreen_pinch_gesture.cc
index 53e15d78fda2dae78b4a1c223d0cc2a5b9685f9c..b3eb9f061ef10da3510d3e2677f4238063ffe555 100644
--- a/content/browser/renderer_host/input/synthetic_pinch_gesture.cc
+++ b/content/browser/renderer_host/input/synthetic_touchscreen_pinch_gesture.cc
@@ -2,7 +2,7 @@
 // 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/synthetic_pinch_gesture.h"
+#include "content/browser/renderer_host/input/synthetic_touchscreen_pinch_gesture.h"
 
 #include <cmath>
 
@@ -11,7 +11,7 @@
 
 namespace content {
 
-SyntheticPinchGesture::SyntheticPinchGesture(
+SyntheticTouchscreenPinchGesture::SyntheticTouchscreenPinchGesture(
     const SyntheticPinchGestureParams& params)
     : params_(params),
       start_y_0_(0.0f),
@@ -19,13 +19,14 @@ SyntheticPinchGesture::SyntheticPinchGesture(
       max_pointer_delta_0_(0.0f),
       gesture_source_type_(SyntheticGestureParams::DEFAULT_INPUT),
       state_(SETUP) {
-    DCHECK_GT(params_.scale_factor, 0.0f);
+  DCHECK_GT(params_.scale_factor, 0.0f);
 }
 
-SyntheticPinchGesture::~SyntheticPinchGesture() {}
+SyntheticTouchscreenPinchGesture::~SyntheticTouchscreenPinchGesture() {}
 
-SyntheticGesture::Result SyntheticPinchGesture::ForwardInputEvents(
-    const base::TimeTicks& timestamp, SyntheticGestureTarget* target) {
+SyntheticGesture::Result SyntheticTouchscreenPinchGesture::ForwardInputEvents(
+    const base::TimeTicks& timestamp,
+    SyntheticGestureTarget* target) {
   if (state_ == SETUP) {
     gesture_source_type_ = params_.gesture_source_type;
     if (gesture_source_type_ == SyntheticGestureParams::DEFAULT_INPUT)
@@ -36,17 +37,19 @@ SyntheticGesture::Result SyntheticPinchGesture::ForwardInputEvents(
   }
 
   DCHECK_NE(gesture_source_type_, SyntheticGestureParams::DEFAULT_INPUT);
-  if (gesture_source_type_ == SyntheticGestureParams::TOUCH_INPUT)
+  if (gesture_source_type_ == SyntheticGestureParams::TOUCH_INPUT) {
     ForwardTouchInputEvents(timestamp, target);
-  else
+  } else {
     return SyntheticGesture::GESTURE_SOURCE_TYPE_NOT_IMPLEMENTED;
+  }
 
   return (state_ == DONE) ? SyntheticGesture::GESTURE_FINISHED
                           : SyntheticGesture::GESTURE_RUNNING;
 }
 
-void SyntheticPinchGesture::ForwardTouchInputEvents(
-    const base::TimeTicks& timestamp, SyntheticGestureTarget* target) {
+void SyntheticTouchscreenPinchGesture::ForwardTouchInputEvents(
+    const base::TimeTicks& timestamp,
+    SyntheticGestureTarget* target) {
   switch (state_) {
     case STARTED:
       // Check for an early finish.
@@ -74,16 +77,18 @@ void SyntheticPinchGesture::ForwardTouchInputEvents(
   }
 }
 
-void SyntheticPinchGesture::PressTouchPoints(SyntheticGestureTarget* target,
-                                             const base::TimeTicks& timestamp) {
+void SyntheticTouchscreenPinchGesture::PressTouchPoints(
+    SyntheticGestureTarget* target,
+    const base::TimeTicks& timestamp) {
   touch_event_.PressPoint(params_.anchor.x(), start_y_0_);
   touch_event_.PressPoint(params_.anchor.x(), start_y_1_);
   ForwardTouchEvent(target, timestamp);
 }
 
-void SyntheticPinchGesture::MoveTouchPoints(SyntheticGestureTarget* target,
-                                            float delta,
-                                            const base::TimeTicks& timestamp) {
+void SyntheticTouchscreenPinchGesture::MoveTouchPoints(
+    SyntheticGestureTarget* target,
+    float delta,
+    const base::TimeTicks& timestamp) {
   // The two pointers move in opposite directions.
   float current_y_0 = start_y_0_ + delta;
   float current_y_1 = start_y_1_ - delta;
@@ -93,20 +98,22 @@ void SyntheticPinchGesture::MoveTouchPoints(SyntheticGestureTarget* target,
   ForwardTouchEvent(target, timestamp);
 }
 
-void SyntheticPinchGesture::ReleaseTouchPoints(
-    SyntheticGestureTarget* target, const base::TimeTicks& timestamp) {
+void SyntheticTouchscreenPinchGesture::ReleaseTouchPoints(
+    SyntheticGestureTarget* target,
+    const base::TimeTicks& timestamp) {
   touch_event_.ReleasePoint(0);
   touch_event_.ReleasePoint(1);
   ForwardTouchEvent(target, timestamp);
 }
 
-void SyntheticPinchGesture::ForwardTouchEvent(
-    SyntheticGestureTarget* target, const base::TimeTicks& timestamp) {
+void SyntheticTouchscreenPinchGesture::ForwardTouchEvent(
+    SyntheticGestureTarget* target,
+    const base::TimeTicks& timestamp) {
   touch_event_.timeStampSeconds = ConvertTimestampToSeconds(timestamp);
   target->DispatchInputEventToPlatform(touch_event_);
 }
 
-void SyntheticPinchGesture::SetupCoordinatesAndStopTime(
+void SyntheticTouchscreenPinchGesture::SetupCoordinatesAndStopTime(
     SyntheticGestureTarget* target) {
   // To achieve the specified scaling factor, the ratio of the final to the
   // initial span (distance between the pointers) has to be equal to the scaling
@@ -118,7 +125,7 @@ void SyntheticPinchGesture::SetupCoordinatesAndStopTime(
     final_distance_to_anchor =
         (initial_distance_to_anchor + target->GetTouchSlopInDips()) *
         params_.scale_factor;
-  } else { // zooming out
+  } else {  // zooming out
     final_distance_to_anchor = target->GetMinScalingSpanInDips() / 2.0f;
     initial_distance_to_anchor =
         (final_distance_to_anchor / params_.scale_factor) +
@@ -138,7 +145,7 @@ void SyntheticPinchGesture::SetupCoordinatesAndStopTime(
       start_time_ + base::TimeDelta::FromMicroseconds(total_duration_in_us);
 }
 
-float SyntheticPinchGesture::GetDeltaForPointer0AtTime(
+float SyntheticTouchscreenPinchGesture::GetDeltaForPointer0AtTime(
     const base::TimeTicks& timestamp) const {
   // Make sure the final delta is correct. Using the computation below can lead
   // to issues with floating point precision.
@@ -152,13 +159,13 @@ float SyntheticPinchGesture::GetDeltaForPointer0AtTime(
                                        : abs_delta_pointer_0;
 }
 
-base::TimeTicks SyntheticPinchGesture::ClampTimestamp(
+base::TimeTicks SyntheticTouchscreenPinchGesture::ClampTimestamp(
     const base::TimeTicks& timestamp) const {
   return std::min(timestamp, stop_time_);
 }
 
-bool SyntheticPinchGesture::HasReachedTarget(const base::TimeTicks& timestamp)
-    const {
+bool SyntheticTouchscreenPinchGesture::HasReachedTarget(
+    const base::TimeTicks& timestamp) const {
   return timestamp >= stop_time_;
 }