Disable ImageWriterUtilityClientTest.VerifyCancel and [etc].WriteCancel.

chrome/browser/extensions/api/image_writer_private/image_writer_utility_client_browsertest.cc

Index: chrome/browser/extensions/api/image_writer_private/image_writer_utility_client_browsertest.cc
diff --git a/chrome/browser/extensions/api/image_writer_private/image_writer_utility_client_browsertest.cc b/chrome/browser/extensions/api/image_writer_private/image_writer_utility_client_browsertest.cc
index 2f082c30a2e50175272369224301abdefb01c671..f3307b455b73d3741da83034c269f803eb7ae5de 100644
--- a/chrome/browser/extensions/api/image_writer_private/image_writer_utility_client_browsertest.cc
+++ b/chrome/browser/extensions/api/image_writer_private/image_writer_utility_client_browsertest.cc
@@ -259,7 +259,8 @@ IN_PROC_BROWSER_TEST_F(ImageWriterUtilityClientTest, WriteVerify) {
   EXPECT_TRUE(error().empty());
 }
 
-IN_PROC_BROWSER_TEST_F(ImageWriterUtilityClientTest, WriteCancel) {
+// TODO(crbug.com/690717): test is flaky.
+IN_PROC_BROWSER_TEST_F(ImageWriterUtilityClientTest, DISABLED_WriteCancel) {
   FillImageFileWithPattern('a');
   FillDeviceFileWithPattern(0);
 
@@ -305,7 +306,8 @@ IN_PROC_BROWSER_TEST_F(ImageWriterUtilityClientTest, Verify) {
   EXPECT_TRUE(error().empty());
 }
 
-IN_PROC_BROWSER_TEST_F(ImageWriterUtilityClientTest, VerifyCancel) {
+// TODO(crbug.com/690717): test is flaky.
+IN_PROC_BROWSER_TEST_F(ImageWriterUtilityClientTest, DISABLED_VerifyCancel) {
   FillImageFileWithPattern('s');
   FillDeviceFileWithPattern('s');