Add ContextMenuCoordinator.

ios/web/web_state/web_state_delegate_bridge_unittest.mm

Index: ios/web/web_state/web_state_delegate_bridge_unittest.mm
diff --git a/ios/web/web_state/web_state_delegate_bridge_unittest.mm b/ios/web/web_state/web_state_delegate_bridge_unittest.mm
index b78ad06f3713276f6a427e9c9c6765d864240e5a..32b49d575a14d833908a73640be85b9e1eb17e92 100644
--- a/ios/web/web_state/web_state_delegate_bridge_unittest.mm
+++ b/ios/web/web_state/web_state_delegate_bridge_unittest.mm
@@ -53,7 +53,7 @@ TEST_F(WebStateDelegateBridgeTest, HandleContextMenu) {
   contextMenuParams.link_url = GURL("http://www.url.com");
   contextMenuParams.src_url = GURL("http://www.url.com/image.jpeg");
   contextMenuParams.referrer_policy = web::ReferrerPolicyOrigin;
-  contextMenuParams.view = [UIView new];
+  contextMenuParams.view.reset([UIView new]);

[Eugene But (OOO till 7-30), 2016/05/20 21:26:46]

NIT: since you touching this could you please s/new/alloc] init]

But ideally this should be a separate CL :)

[michaeldo, 2016/05/23 21:19:08]

I'll fix and make a seperate cl :)

   contextMenuParams.location = CGPointMake(5.0, 5.0);
   bridge_->HandleContextMenu(nullptr, contextMenuParams);
   web::ContextMenuParams* resultParams = [delegate_ contextMenuParams];