Increase timeout to reduce ios_web_inttests flake.

ios/web/browser_state_web_view_partition_inttest.mm

Index: ios/web/browser_state_web_view_partition_inttest.mm
diff --git a/ios/web/browser_state_web_view_partition_inttest.mm b/ios/web/browser_state_web_view_partition_inttest.mm
index 43499b45e85afb728e20b3e52c1b65515552f1e9..7c6327f2bc383a1dd3ef4baee1546dd0f7c84953 100644
--- a/ios/web/browser_state_web_view_partition_inttest.mm
+++ b/ios/web/browser_state_web_view_partition_inttest.mm
@@ -11,6 +11,7 @@
 #import "base/mac/scoped_nsobject.h"
 #include "base/memory/ptr_util.h"
 #import "base/test/ios/wait_util.h"
+#include "base/time/time.h"
 #include "ios/web/public/browser_state.h"
 #import "ios/web/public/test/http_server.h"
 #import "ios/web/public/test/js_test_util.h"
@@ -114,9 +115,11 @@ class BrowserStateWebViewPartitionTest : public web::WebIntTest {
 
     NSURL* url = net::NSURLWithGURL(server.MakeUrl("http://whatever/"));
     [web_view loadRequest:[NSURLRequest requestWithURL:url]];
-    base::test::ios::WaitUntilCondition(^bool {
-      return [navigation_delegate didFinishNavigation];
-    });
+    base::test::ios::WaitUntilCondition(
+        ^bool {
+          return [navigation_delegate didFinishNavigation];
+        },
+        false, base::TimeDelta::FromSeconds(1));

[Eugene But (OOO till 7-30), 2017/02/15 15:45:52]

I thought on bots the default timeout is around 2 days:
https://cs.chromium.org/chromium/src/base/test/test_timeouts.cc?type=cs&q=kAl...

If that's not true, then please use testing::kWaitForPageLoadTimeout instead.

[michaeldo, 2017/02/16 07:55:32]

It does look like the timeout is very long for "Debug" mode or if a flag is
passed. I don't see any reference to the flag, but it looks possible that the
bots run in Debug. However, when I reduce the timeout locally, I am able to
reproduce the same bot failures. I updated the time to a constant of the
expected type rather than the suggested |testing::kWaitForPageLoadTimeout|. I
believe it's best to try the longer timeout and see if it effects the flake
since the current flake rate is quite extreme.

 
     web_view.navigationDelegate = old_navigation_delegate;
   }