[Offline pages] Introduces TaskQueue to serialize tasks that asynchronously access SQLStore

components/offline_pages/core/BUILD.gn

Index: components/offline_pages/core/BUILD.gn
diff --git a/components/offline_pages/request_header/BUILD.gn b/components/offline_pages/core/BUILD.gn
similarity index 69%
copy from components/offline_pages/request_header/BUILD.gn
copy to components/offline_pages/core/BUILD.gn
index 711623cc3481ce69aee7d0bf41b1812ca406ff85..f804fcbd06d8faf7f7636b28e8924847fc67b947 100644
--- a/components/offline_pages/request_header/BUILD.gn
+++ b/components/offline_pages/core/BUILD.gn
@@ -6,10 +6,10 @@ if (is_android) {
   import("//build/config/android/rules.gni")
 }
 
-static_library("request_header") {
+static_library("offline_pages_core") {
   sources = [
-    "offline_page_header.cc",
-    "offline_page_header.h",
+    "task_queue.cc",

[Pete Williamson, 2016/09/27 23:49:47]

What happened to offline_page_header?  Did it get removed, or is all its content
in task_queue.cc now?

[fgorski, 2016/09/28 22:19:28]

I think this is a quirkiness of the diffing system. This patch creates this
file.

+    "task_queue.h",
   ]
 
   deps = [
@@ -20,13 +20,12 @@ static_library("request_header") {
 source_set("unit_tests") {
   testonly = true
   sources = [
-    "offline_page_header_unittest.cc",
+    "task_queue_unittest.cc",
   ]
 
   deps = [
-    ":request_header",
+    ":offline_pages_core",
     "//base",
     "//base/test:test_support",
-    "//testing/gtest",
   ]
 }