Reduce the in-memory blob storgae limit on Android

content/browser/indexed_db/indexed_db_browsertest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stddef.h>
 #include <stdint.h>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 471 matching lines @@
       ChromeBlobStorageContext::GetFor(
           shell()->web_contents()->GetBrowserContext());
   EXPECT_EQ(0UL, blob_context->context()->blob_count());
 }
 
 IN_PROC_BROWSER_TEST_F(IndexedDBBrowserTest, BlobsCountAgainstQuota) {
   SimpleTest(GetTestUrl("indexeddb", "blobs_use_quota.html"));
 }
 
 IN_PROC_BROWSER_TEST_F(IndexedDBBrowserTest, DeleteForOriginDeletesBlobs) {
-  SimpleTest(GetTestUrl("indexeddb", "write_20mb_blob.html"));
+  SimpleTest(GetTestUrl("indexeddb", "write_4mb_blob.html"));

[jsbell, 2017/05/04 22:11:37]

If you wanted to get fancy we could make this parameterized:
write_blob_mbs.html#4

... and then in the script use Number(document.location.hash.substring(1)) *
1024 * 1024

[ssid, 2017/05/05 00:34:23]

hm actually changing the file name causes the test unable to read the file.
(content::GetTestFilePath does not split the name).

[jsbell, 2017/05/05 18:53:05]

huh. It looked like we used that pattern elsewhere but maybe it requires more
refactoring.

Anyway, glad this is in, we can tweak it later.

\o/

   int64_t size = RequestDiskUsage();
   // This assertion assumes that we do not compress blobs.
-  EXPECT_GT(size, 20 << 20 /* 20 MB */);
+  EXPECT_GT(size, 4 << 20 /* 4 MB */);
   // TODO(jsbell): Remove static_cast<> when overloads are eliminated.
   GetContext()->TaskRunner()->PostTask(
       FROM_HERE,
       base::Bind(static_cast<void (IndexedDBContextImpl::*)(const GURL&)>(
                      &IndexedDBContextImpl::DeleteForOrigin),
                  GetContext(), GURL("file:///")));
   scoped_refptr<base::ThreadTestHelper> helper(new base::ThreadTestHelper(
       BrowserMainLoop::GetInstance()->indexed_db_thread()->task_runner()));
   ASSERT_TRUE(helper->Run());
   EXPECT_EQ(0, RequestDiskUsage());
@@ skipping 347 matching lines @@
     command_line->AppendSwitch(switches::kSingleProcess);
   }
 };
 
 IN_PROC_BROWSER_TEST_F(IndexedDBBrowserTestSingleProcess,
                        RenderThreadShutdownTest) {
   SimpleTest(GetTestUrl("indexeddb", "shutdown_with_requests.html"));
 }
 
 }  // namespace content