Add validation to a few WebPointerProperties.

Will be used in mojoifying input messages.

BUG=722928

Review-Url: https://codereview.chromium.org/2915783003
Cr-Commit-Position: refs/heads/master@{#476330}

content/common/DEPS

@@ -27,6 +27,7 @@ include_rules = [
   "+third_party/WebKit/public/platform/WebKeyboardEvent.h",
   "+third_party/WebKit/public/platform/WebMixedContentContextType.h",
   "+third_party/WebKit/public/platform/WebMouseWheelEvent.h",
+  "+third_party/WebKit/public/platform/WebPointerProperties.h",
   "+third_party/WebKit/public/platform/WebOriginTrialTokenStatus.h",
   "+third_party/WebKit/public/platform/WebPageVisibilityState.h",
   "+third_party/WebKit/public/platform/WebReferrerPolicy.h",

content/common/input_messages.h

@@ -28,6 +28,7 @@
 #include "content/common/input/synthetic_tap_gesture_params.h"
 #include "ipc/ipc_message_macros.h"
 #include "third_party/WebKit/public/platform/WebInputEvent.h"
+#include "third_party/WebKit/public/platform/WebPointerProperties.h"
 #include "ui/events/blink/did_overscroll_params.h"
 #include "ui/gfx/geometry/point.h"
 #include "ui/gfx/geometry/rect.h"
@@ -64,6 +65,11 @@ IPC_ENUM_TRAITS_MAX_VALUE(
 IPC_ENUM_TRAITS_MAX_VALUE(content::InputEventDispatchType,
                           content::InputEventDispatchType::DISPATCH_TYPE_MAX)
 IPC_ENUM_TRAITS_MAX_VALUE(cc::TouchAction, cc::kTouchActionMax)
+IPC_ENUM_TRAITS_MIN_MAX_VALUE(blink::WebPointerProperties::Button,
+                              blink::WebPointerProperties::Button::kNoButton,
+                              blink::WebPointerProperties::Button::kLastEntry)
+IPC_ENUM_TRAITS_MAX_VALUE(blink::WebPointerProperties::PointerType,
+                          blink::WebPointerProperties::PointerType::kLastEntry)
 
 IPC_STRUCT_TRAITS_BEGIN(ui::DidOverscrollParams)
   IPC_STRUCT_TRAITS_MEMBER(accumulated_overscroll)

third_party/WebKit/public/platform/WebPointerProperties.h

@@ -29,7 +29,8 @@ class WebPointerProperties {
     kRight,
     kBack,
     kForward,
-    kEraser
+    kEraser,
+    kLastEntry = kEraser  // Must be the last entry in the list
   };
 
   enum class Buttons : unsigned {