Support multi-button press for synthetic mouse events

content/browser/renderer_host/input/synthetic_touch_driver.cc

Index: content/browser/renderer_host/input/synthetic_touch_driver.cc
diff --git a/content/browser/renderer_host/input/synthetic_touch_driver.cc b/content/browser/renderer_host/input/synthetic_touch_driver.cc
index 2926c575eb6781775ca82b6f4263f7011f6291bc..522208c0fb242b38542a9d19388534ccfcec5328 100644
--- a/content/browser/renderer_host/input/synthetic_touch_driver.cc
+++ b/content/browser/renderer_host/input/synthetic_touch_driver.cc
@@ -27,7 +27,10 @@ void SyntheticTouchDriver::DispatchEvent(SyntheticGestureTarget* target,
   touch_event_.ResetPoints();
 }
 
-void SyntheticTouchDriver::Press(float x, float y, int index) {
+void SyntheticTouchDriver::Press(float x,
+                                 float y,
+                                 int index,
+                                 SyntheticPointerActionParams::Button button) {
   DCHECK_GE(index, 0);
   DCHECK_LT(index, blink::WebTouchEvent::kTouchesLengthCap);
   int touch_index = touch_event_.PressPoint(x, y);
@@ -40,7 +43,9 @@ void SyntheticTouchDriver::Move(float x, float y, int index) {
   touch_event_.MovePoint(index_map_[index], x, y);
 }
 
-void SyntheticTouchDriver::Release(int index) {
+void SyntheticTouchDriver::Release(
+    int index,
+    SyntheticPointerActionParams::Button button) {
   DCHECK_GE(index, 0);
   DCHECK_LT(index, blink::WebTouchEvent::kTouchesLengthCap);
   touch_event_.ReleasePoint(index_map_[index]);