Import SQLite 3.7.6.3.

third_party/sqlite/src/test/pcache.test

Index: third_party/sqlite/src/test/pcache.test
diff --git a/third_party/sqlite/src/test/pcache.test b/third_party/sqlite/src/test/pcache.test
index 7c0951e982a7b27324d17b3662ee9d71f058af67..5dc3059c44834cfbe02049f5d51df1e18d9a39c8 100644
--- a/third_party/sqlite/src/test/pcache.test
+++ b/third_party/sqlite/src/test/pcache.test
@@ -16,6 +16,18 @@
 set testdir [file dirname $argv0]
 source $testdir/tester.tcl
 
+# Do not use a codec for tests in this file, as the database file is
+# manipulated directly using tcl scripts (using the [hexio_write] command).
+#
+do_not_use_codec
+
+# Only works with a mode-2 pcache where all pcaches share a single set
+# of pages.
+#
+ifcapable {!memorymanage && threadsafe} {
+  finish_test
+  return
+}
 
 # The pcache module limits the number of pages available to purgeable
 # caches to the sum of the 'cache_size' values for the set of open