mojo: Plumb through sufficient context to make real blink::WebInputEvents.

ui/events/cocoa/events_mac.mm

Index: ui/events/cocoa/events_mac.mm
diff --git a/ui/events/cocoa/events_mac.mm b/ui/events/cocoa/events_mac.mm
index 1d5d2b86c2c741af5eb7c94c41332643032d3b46..b9f010559ef392a0cf732d796760f1548884ee82 100644
--- a/ui/events/cocoa/events_mac.mm
+++ b/ui/events/cocoa/events_mac.mm
@@ -213,6 +213,48 @@ uint32 PlatformKeycodeFromNative(const base::NativeEvent& native_event) {
   return native_event.keyCode;
 }
 
+uint32 WindowsKeycodeFromNative(const base::NativeEvent& native_event) {
+  return static_cast<uint32>(KeyboardCodeFromNSEvent(native_event));
+}
+
+uint16 TextFromNative(const base::NativeEvent& native_event) {
+  NSString* text = @"";
+  if ([native_event type] != NSFlagsChanged)
+    text = [native_event characters];
+
+  // These exceptions are based on WebInputEventFactoryMac.mm:
+  uint32 windows_keycode = WindowsKeycodeFromNative(native_event);
+  if (windows_keycode == '\r')
+    text = @"\r";
+  if ([text isEqualToString:@"\x7F"])
+    text = @"\x8";
+  if (windows_keycode == 9)
+    text = @"\x9";
+
+  uint16 return_value;
+  [text getCharacters:&return_value];
+  return return_value;
+}
+
+uint16 UnmodifiedTextFromNative(const base::NativeEvent& native_event) {
+  NSString* text = @"";
+  if ([native_event type] != NSFlagsChanged)
+    text = [native_event charactersIgnoringModifiers];
+
+  // These exceptions are based on WebInputEventFactoryMac.mm:
+  uint32 windows_keycode = WindowsKeycodeFromNative(native_event);
+  if (windows_keycode == '\r')
+    text = @"\r";
+  if ([text isEqualToString:@"\x7F"])
+    text = @"\x8";
+  if (windows_keycode == 9)
+    text = @"\x9";
+
+  uint16 return_value;
+  [text getCharacters:&return_value];
+  return return_value;
+}
+
 bool IsCharFromNative(const base::NativeEvent& native_event) {
   return false;
 }