Remove the check for input_state in the session for all pointers

In ExecutePerformActions function, we have checked if all the
coordinates stored in input_state for all pointers are integers. Right
now, we did not clear the states from the previous session, which
makes this check fail for some wpt pointerevent tests.
https://wpt.fyi/results/pointerevents/
pointerevent_touch-action-keyboard.html?label=master&label=experimental

We will add it back once we have added the ExecuteReleaseActions
function after running each test in wpt serve.

Bug: 606367
Change-Id: Ifda3d57fd8cc0506f713ee26984eb2cbceff02ca
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1713249Reviewed-by: John Chen <johnchen@chromium.org>
Commit-Queue: Lan Wei <lanwei@chromium.org>
Cr-Commit-Position: refs/heads/master@{#680031}

chrome/test/chromedriver/window_commands.cc

@@ -1429,10 +1429,10 @@ Status ExecutePerformActions(Session* session,
         }
       }
 
-      int init_x, init_y;
-      if (!input_state->GetInteger("x", &init_x) ||
-          !input_state->GetInteger("y", &init_y))
-        return Status(kUnknownError, "invalid input state");
+      int init_x = 0;
+      int init_y = 0;
+      input_state->GetInteger("x", &init_x);
+      input_state->GetInteger("y", &init_y);
 
       if (pointer_type == "mouse" || pointer_type == "pen") {
         longest_mouse_list_size =