[sql] Rewrite sqlite patching "system".

third_party/sqlite/patches/0004-Use-seperate-page-cache-pools-for-each-sqlite-connec.patch

Index: third_party/sqlite/patches/0004-Use-seperate-page-cache-pools-for-each-sqlite-connec.patch
diff --git a/third_party/sqlite/separate_cache_pool.patch b/third_party/sqlite/patches/0004-Use-seperate-page-cache-pools-for-each-sqlite-connec.patch
similarity index 59%
rename from third_party/sqlite/separate_cache_pool.patch
rename to third_party/sqlite/patches/0004-Use-seperate-page-cache-pools-for-each-sqlite-connec.patch
index cf22f355ff0da15c329251d94446f3e34a368db8..5f489415544dbf7750d539ceb2e5923a9a723613 100644
--- a/third_party/sqlite/separate_cache_pool.patch
+++ b/third_party/sqlite/patches/0004-Use-seperate-page-cache-pools-for-each-sqlite-connec.patch
@@ -1,7 +1,24 @@
-diff --git src/pcache1.c src/pcache1.c
+From c2aeb929d49005da3901155f155eb145590c5f91 Mon Sep 17 00:00:00 2001
+From: Scott Hess <shess@chromium.org>
+Date: Tue, 16 Dec 2014 13:07:41 -0800
+Subject: [PATCH 04/24] Use seperate page-cache pools for each sqlite
+ connection.
+
+Due to multiple different subsystems using sqlite, the shared global page
+cache policy does not suite our use-cases on Chrome very well.  This CL
+enables a compile time flag to be set to disable shared cache pools.
+
+BUG=243769
+
+Original review URL: https://chromiumcodereview.appspot.com/17413004
+---
+ third_party/sqlite/src/src/pcache1.c | 8 ++++++--
+ 1 file changed, 6 insertions(+), 2 deletions(-)
+
+diff --git a/third_party/sqlite/src/src/pcache1.c b/third_party/sqlite/src/src/pcache1.c
 index ad44395..e4d0705 100644
---- src/pcache1.c
-+++ src/pcache1.c
+--- a/third_party/sqlite/src/src/pcache1.c
++++ b/third_party/sqlite/src/src/pcache1.c
 @@ -549,10 +549,12 @@ static sqlite3_pcache *pcache1Create(int szPage, int bPurgeable){
    int sz;               /* Bytes of memory required to allocate the new cache */
  
@@ -27,3 +44,6 @@ index ad44395..e4d0705 100644
    const int separateCache = 0;
  #else
    int separateCache = sqlite3GlobalConfig.bCoreMutex>0;
+-- 
+2.2.1
+