Histograms for DOMStorage access

Review URL: http://codereview.chromium.org/8426003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@108102 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 14 insertions, 0 deletions

diff --git a/content/renderer/renderer_webstoragearea_impl.cc b/content/renderer/renderer_webstoragearea_impl.cc
index d3063ec..bd4d03b 100644
--- a/content/renderer/renderer_webstoragearea_impl.cc
+++ b/content/renderer/renderer_webstoragearea_impl.cc
@@ -4,6 +4,8 @@
 
 #include "content/renderer/renderer_webstoragearea_impl.h"
 
+#include "base/metrics/histogram.h"
+#include "base/time.h"
 #include "content/common/dom_storage_messages.h"
 #include "content/renderer/render_thread_impl.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebStorageNamespace.h"
@@ -25,22 +27,28 @@ RendererWebStorageAreaImpl::~RendererWebStorageAreaImpl() {
 
 unsigned RendererWebStorageAreaImpl::length() {
   unsigned length;
+  base::Time start = base::Time::Now();
   RenderThreadImpl::current()->Send(
       new DOMStorageHostMsg_Length(storage_area_id_, &length));
+  UMA_HISTOGRAM_TIMES("DOMStorage.length", base::Time::Now() - start);
   return length;
 }
 
 WebString RendererWebStorageAreaImpl::key(unsigned index) {
   NullableString16 key;
+  base::Time start = base::Time::Now();
   RenderThreadImpl::current()->Send(
       new DOMStorageHostMsg_Key(storage_area_id_, index, &key));
+  UMA_HISTOGRAM_TIMES("DOMStorage.key", base::Time::Now() - start);
   return key;
 }
 
 WebString RendererWebStorageAreaImpl::getItem(const WebString& key) {
   NullableString16 value;
+  base::Time start = base::Time::Now();
   RenderThreadImpl::current()->Send(
       new DOMStorageHostMsg_GetItem(storage_area_id_, key, &value));
+  UMA_HISTOGRAM_TIMES("DOMStorage.getItem", base::Time::Now() - start);
   return value;
 }
 
@@ -53,21 +61,27 @@ void RendererWebStorageAreaImpl::setItem(
     return;
   }
   NullableString16 old_value;
+  base::Time start = base::Time::Now();
   RenderThreadImpl::current()->Send(new DOMStorageHostMsg_SetItem(
       storage_area_id_, key, value, url, &result, &old_value));
+  UMA_HISTOGRAM_TIMES("DOMStorage.setItem", base::Time::Now() - start);
   old_value_webkit = old_value;
 }
 
 void RendererWebStorageAreaImpl::removeItem(
     const WebString& key, const WebURL& url, WebString& old_value_webkit) {
   NullableString16 old_value;
+  base::Time start = base::Time::Now();
   RenderThreadImpl::current()->Send(
       new DOMStorageHostMsg_RemoveItem(storage_area_id_, key, url, &old_value));
+  UMA_HISTOGRAM_TIMES("DOMStorage.removeItem", base::Time::Now() - start);
   old_value_webkit = old_value;
 }
 
 void RendererWebStorageAreaImpl::clear(
     const WebURL& url, bool& cleared_something) {
+  base::Time start = base::Time::Now();
   RenderThreadImpl::current()->Send(
       new DOMStorageHostMsg_Clear(storage_area_id_, url, &cleared_something));
+  UMA_HISTOGRAM_TIMES("DOMStorage.clear", base::Time::Now() - start);
 }