Store binary flags in bool instead of int in WebInputEvent

public/web/WebInputEvent.h

Index: public/web/WebInputEvent.h
diff --git a/public/web/WebInputEvent.h b/public/web/WebInputEvent.h
index c90ca057052aadb5f94a6a3221249a050fa5641b..d669fabc12a0ed5a1ee3c92e18881e7276c60f48 100644
--- a/public/web/WebInputEvent.h
+++ b/public/web/WebInputEvent.h
@@ -243,7 +243,6 @@ public:
     // http://msdn.microsoft.com/en-us/library/ms646286(VS.85).aspx for
     // details). Other platforms don't have this concept, but it's just
     // easier to leave it always false than ifdef.
-    // See comment at the top of the file for why an int is used here.
     bool isSystemKey;
 
     // |text| is the text generated by this keystroke.  |unmodifiedText| is
@@ -353,15 +352,9 @@ public:
     float accelerationRatioX;
     float accelerationRatioY;
 
-    // See comment at the top of the file for why an int is used here.
-    int scrollByPage;
-
-    // See comment at the top of the file for why an int is used here.
-    int hasPreciseScrollingDeltas;
     Phase phase;
     Phase momentumPhase;
 
-    // See comment at the top of the file for why an int is used here.
     // Rubberbanding is an OSX visual effect. When a user scrolls the content
     // area with a track pad, and the content area is already at its limit in
     // the direction being scrolled, the entire content area is allowed to
@@ -376,8 +369,11 @@ public:
     // but have no effect on an ongoing rubber banding. A rubber banding that
     // started in the vertical direction is allowed to continue in the right
     // direction, even if canRubberbandRight is 0.
-    int canRubberbandLeft;
-    int canRubberbandRight;
+    bool canRubberbandLeft;
+    bool canRubberbandRight;
+
+    bool scrollByPage;
+    bool hasPreciseScrollingDeltas;
 
     WebMouseWheelEvent()
         : WebMouseEvent(sizeof(WebMouseWheelEvent))
@@ -387,12 +383,12 @@ public:
         , wheelTicksY(0.0f)
         , accelerationRatioX(1.0f)
         , accelerationRatioY(1.0f)
-        , scrollByPage(false)
-        , hasPreciseScrollingDeltas(false)
         , phase(PhaseNone)
         , momentumPhase(PhaseNone)
         , canRubberbandLeft(true)
         , canRubberbandRight(true)
+        , scrollByPage(false)
+        , hasPreciseScrollingDeltas(false)
     {
     }
 };
@@ -448,19 +444,13 @@ public:
             float deltaY;
             float velocityX;
             float velocityY;
-
-            // TODO: Use a bitfield instead of two ints for these flags
-
             // Whether any previous GestureScrollUpdate in the current scroll
             // sequence was suppressed (e.g., the causal touchmove was
             // preventDefault'ed). This bit is particularly useful for
             // determining whether the observed scroll update sequence captures
             // the entirety of the generative motion.
-            // See comment at the top for why an int is used here instead of a bool.
-            int previousUpdateInSequencePrevented;
-            // See comment at the top of the file for why an int is used here
-            // instead of a bool.
-            int preventPropagation;
+            bool previousUpdateInSequencePrevented;
+            bool preventPropagation;
         } scrollUpdate;
 
         struct {
@@ -498,16 +488,14 @@ public:
 
     // Whether the event can be canceled (with preventDefault). If true then the browser
     // must wait for an ACK for this event. If false then no ACK IPC is expected.
-    // See comment at the top for why an int is used here instead of a bool.
-    int cancelable;
+    bool cancelable;
 
     // Whether the event will produce scroll-inducing events if uncanceled. This
     // will be true for touchmove events after the platform slop region has been
     // exceeded and fling-generating touchend events. Note that this doesn't
     // necessarily mean content will scroll, only that scroll events will be
     // generated.
-    // See comment at the top for why an int is used here instead of a bool.
-    int causesScrollingIfUncanceled;
+    bool causesScrollingIfUncanceled;
 
     WebTouchEvent()
         : WebInputEvent(sizeof(WebTouchEvent))