Fix implicit 64 to 32 conversion in Chrome process finder.

../../chrome/browser/win/chrome_process_finder.cc(97,41):  warning: implicit conversion loses integer precision: 'int64_t' (aka 'long long') to 'int' [-Wshorten-64-to-32]
  timeout_in_milliseconds = new_timeout.InMilliseconds();
                          ~ ~~~~~~~~~~~~^~~~~~~~~~~~~~~~

BUG=879657

Change-Id: I2a711f97feb92925a3b53e08d06af5da1b61820e
Reviewed-on: https://chromium-review.googlesource.com/1214744
Commit-Queue: Will Harris <wfh@chromium.org>
Reviewed-by: Greg Thompson <grt@chromium.org>
Cr-Commit-Position: refs/heads/master@{#590416}

chrome/browser/win/chrome_process_finder.cc

@@ -11,6 +11,7 @@
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/logging.h"
+#include "base/numerics/safe_conversions.h"
 #include "base/process/process.h"
 #include "base/process/process_info.h"
 #include "base/strings/string_number_conversions.h"
@@ -25,7 +26,7 @@
 
 namespace {
 
-int timeout_in_milliseconds = 20 * 1000;
+uint32_t g_timeout_in_milliseconds = 20 * 1000;
 
 }  // namespace
 
@@ -74,7 +75,7 @@ NotifyChromeResult AttemptToNotifyRunningChrome(HWND remote_window,
   DWORD_PTR result = 0;
   if (::SendMessageTimeout(remote_window, WM_COPYDATA, NULL,
                            reinterpret_cast<LPARAM>(&cds), SMTO_ABORTIFHUNG,
-                           timeout_in_milliseconds, &result)) {
+                           g_timeout_in_milliseconds, &result)) {
     return result ? NOTIFY_SUCCESS : NOTIFY_FAILED;
   }
 
@@ -93,8 +94,9 @@ NotifyChromeResult AttemptToNotifyRunningChrome(HWND remote_window,
 
 base::TimeDelta SetNotificationTimeoutForTesting(base::TimeDelta new_timeout) {
   base::TimeDelta old_timeout =
-      base::TimeDelta::FromMilliseconds(timeout_in_milliseconds);
-  timeout_in_milliseconds = new_timeout.InMilliseconds();
+      base::TimeDelta::FromMilliseconds(g_timeout_in_milliseconds);
+  g_timeout_in_milliseconds =
+      base::checked_cast<uint32_t>(new_timeout.InMilliseconds());
   return old_timeout;
 }