Changed how checkers sample identifies whether a hit occurred using

clientId rather than object equality. In both Safari and Chrome, if
the browser's JavaScript engine is used rather than O3D's embedded V8,
these equality comparisons fail. It looks like we may need to disable
the use of the embedded V8 for this sample due to bad interactions
with event dispatching.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/2334001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@48451 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 4 insertions, 2 deletions

diff --git a/o3d/samples/checkers.html b/o3d/samples/checkers.html
index 144ee6d..a43e1b395 100644
--- a/o3d/samples/checkers.html
+++ b/o3d/samples/checkers.html
@@ -581,11 +581,13 @@ function detectSelection(e) {
   if (pickInfo) {
     // get the parent transform of this object.
     var pickTrans = pickInfo.shapeInfo.parent.transform;
+    var pickTransClientId = pickTrans.clientId;
 
     // check if a board square or a piece.
     for (var x = 0; x < g_boardSize; x += 1) {
       for (var y = 0; y < g_boardSize; y += 1) {
-        if (pickTrans === g_board[x][y].piece) {
+        if (g_board[x][y].piece &&
+            pickTransClientId == g_board[x][y].piece.clientId) {
           // do not select another player's piece.
           if (g_player != g_board[x][y].type) return;
 
@@ -605,7 +607,7 @@ function detectSelection(e) {
 
           SelectPiece(x, y);
           return;
-        } else if (pickTrans === g_board[x][y].square) {
+        } else if (pickTransClientId == g_board[x][y].square.clientId) {
           // selected the landing square if a piece move is pending.
           if (g_selectedPiece) {
             // check if a forced jump.