Implement the renderer side of the mojo based local storage implementation.

content/renderer/dom_storage/local_storage_area.cc

Index: content/renderer/dom_storage/local_storage_area.cc
diff --git a/content/renderer/dom_storage/local_storage_area.cc b/content/renderer/dom_storage/local_storage_area.cc
index 37e27433ffcc9859c2c1525d96485d3b7815903c..fa1a5f49f1ef9886132382ffebaee455540cd2e1 100644
--- a/content/renderer/dom_storage/local_storage_area.cc
+++ b/content/renderer/dom_storage/local_storage_area.cc
@@ -4,6 +4,8 @@
 
 #include "content/renderer/dom_storage/local_storage_area.h"
 
+#include "base/rand_util.h"
+#include "base/strings/string_number_conversions.h"
 #include "third_party/WebKit/public/platform/WebURL.h"
 
 using blink::WebString;
@@ -11,12 +13,14 @@ using blink::WebURL;
 
 namespace content {
 
-LocalStorageArea::LocalStorageArea(
-    scoped_refptr<LocalStorageCachedArea> cached_area)
-    : cached_area_(std::move(cached_area)) {
+LocalStorageArea::LocalStorageArea(LocalStorageCachedArea* cached_area)
+    : cached_area_(cached_area),
+      id_(base::Uint64ToString(base::RandUint64())) {
+  cached_area_->LocalStorageAreaCreated(this);
 }
 
 LocalStorageArea::~LocalStorageArea() {
+  cached_area_->LocalStorageAreaDestroyed(this);
 }
 
 unsigned LocalStorageArea::length() {
@@ -34,7 +38,7 @@ WebString LocalStorageArea::getItem(const WebString& key) {
 void LocalStorageArea::setItem(
     const WebString& key, const WebString& value, const WebURL& page_url,
     WebStorageArea::Result& result) {
-  if (!cached_area_->SetItem(key, value, page_url))
+  if (!cached_area_->SetItem(key, value, page_url, id_))
     result = ResultBlockedByQuota;
   else
     result = ResultOK;
@@ -42,10 +46,11 @@ void LocalStorageArea::setItem(
 
 void LocalStorageArea::removeItem(
     const WebString& key, const WebURL& page_url) {
-  cached_area_->RemoveItem(key, page_url);
+  cached_area_->RemoveItem(key, page_url, id_);
 }
 
 void LocalStorageArea::clear(const WebURL& page_url) {
+  cached_area_->Clear(page_url, id_);
 }
 
 }  // namespace content