Support Coalesced Touch in ppapi

content/renderer/pepper/pepper_plugin_instance_impl.cc

Index: content/renderer/pepper/pepper_plugin_instance_impl.cc
diff --git a/content/renderer/pepper/pepper_plugin_instance_impl.cc b/content/renderer/pepper/pepper_plugin_instance_impl.cc
index 592133d4f5756491bb5a4f73d0e54de432c56972..fa9fbdc616bbe0aed066b269014a266b02a28e4f 100644
--- a/content/renderer/pepper/pepper_plugin_instance_impl.cc
+++ b/content/renderer/pepper/pepper_plugin_instance_impl.cc
@@ -97,6 +97,7 @@
 #include "printing/features/features.h"
 #include "skia/ext/platform_canvas.h"
 #include "third_party/WebKit/public/platform/URLConversion.h"
+#include "third_party/WebKit/public/platform/WebCoalescedInputEvent.h"
 #include "third_party/WebKit/public/platform/WebCursorInfo.h"
 #include "third_party/WebKit/public/platform/WebFloatRect.h"
 #include "third_party/WebKit/public/platform/WebInputEvent.h"
@@ -1115,6 +1116,23 @@ gfx::Rect PepperPluginInstanceImpl::GetCaretBounds() const {
   return caret;
 }
 
+bool PepperPluginInstanceImpl::HandleCoalescedInputEvent(
+    const blink::WebCoalescedInputEvent& event,
+    WebCursorInfo* cursor_info) {
+  bool result = HandleInputEvent(event.Event(), cursor_info);
+
+  if (blink::WebInputEvent::IsTouchEventType(event.Event().GetType()) &&
+      ((filtered_input_event_mask_ & PP_INPUTEVENT_CLASS_COALESCED_TOUCH) ||
+       (input_event_mask_ & PP_INPUTEVENT_CLASS_COALESCED_TOUCH))) {
+    // Handle all the Touch Events one by one. The event at index 0 is
+    // event.Event().

[Navid Zolghadr, 2017/05/01 15:53:33]

Is there any reason you are only doing this for touch events and not mouse
events?

[jkwang, 2017/05/02 18:59:15]

There is no reason to not do it for mouse events. We can add the support for
mouse event later if we care(Is there a use case?). Currently, touch events
should be good enough for stylus support in ink.

+    for (size_t i = 1; i < event.CoalescedEventSize(); ++i) {
+      HandleInputEvent(event.CoalescedEvent(i), cursor_info);
+    }
+  }
+  return result;
+}
+
 bool PepperPluginInstanceImpl::HandleInputEvent(
     const blink::WebInputEvent& event,
     WebCursorInfo* cursor_info) {