Add use counter for chrome.loadTimes

BUG=621512

Review-Url: https://codereview.chromium.org/2222573003
Cr-Commit-Position: refs/heads/master@{#410427}

chrome/renderer/loadtimes_extension_bindings.cc

@@ -109,7 +109,10 @@ class LoadTimesExtensionWrapper : public v8::Extension {
   static void LoadtimesGetter(
       v8::Local<v8::Name> name,
       const v8::PropertyCallbackInfo<v8::Value>& info) {
-    // TODO(panicker): Add Usage counter.
+    if (WebLocalFrame* frame = WebLocalFrame::frameForCurrentContext()) {
+      frame->usageCountChromeLoadTimes(blink::WebString::fromUTF8(
+          *v8::String::Utf8Value(name)));
+    }
     info.GetReturnValue().Set(info.Data());
   }
 

third_party/WebKit/Source/core/frame/UseCounter.h

@@ -1259,6 +1259,21 @@ public:
         SVGSMILAdditiveAnimation = 1484,
         SendBeaconWithNonSimpleContentType = 1485,
 
+        ChromeLoadTimesRequestTime = 1486,
+        ChromeLoadTimesStartLoadTime = 1487,
+        ChromeLoadTimesCommitLoadTime = 1488,
+        ChromeLoadTimesFinishDocumentLoadTime = 1489,
+        ChromeLoadTimesFinishLoadTime = 1490,
+        ChromeLoadTimesFirstPaintTime = 1491,
+        ChromeLoadTimesFirstPaintAfterLoadTime = 1492,
+        ChromeLoadTimesNavigationType = 1493,
+        ChromeLoadTimesWasFetchedViaSpdy = 1494,
+        ChromeLoadTimesWasNpnNegotiated = 1495,
+        ChromeLoadTimesNpnNegotiatedProtocol = 1496,
+        ChromeLoadTimesWasAlternateProtocolAvailable = 1497,
+        ChromeLoadTimesConnectionInfo = 1498,
+        ChromeLoadTimesUnknown = 1499,
+
         // Add new features immediately above this line. Don't change assigned
         // numbers of any item, and don't reuse removed slots.
         // Also, run update_use_counter_feature_enum.py in chromium/src/tools/metrics/histograms/

third_party/WebKit/Source/web/WebLocalFrameImpl.cpp

@@ -2188,4 +2188,37 @@ void WebLocalFrameImpl::clearActiveFindMatch()
     ensureTextFinder().clearActiveFindMatch();
 }
 
+void WebLocalFrameImpl::usageCountChromeLoadTimes(const WebString& metric)
+{
+    UseCounter::Feature feature = UseCounter::ChromeLoadTimesUnknown;
+    if (metric == "requestTime") {
+        feature = UseCounter::ChromeLoadTimesRequestTime;
+    } else if (metric == "startLoadTime") {
+        feature = UseCounter::ChromeLoadTimesStartLoadTime;
+    } else if (metric == "commitLoadTime") {
+        feature = UseCounter::ChromeLoadTimesCommitLoadTime;
+    } else if (metric == "finishDocumentLoadTime") {
+        feature = UseCounter::ChromeLoadTimesFinishDocumentLoadTime;
+    } else if (metric == "finishLoadTime") {
+        feature = UseCounter::ChromeLoadTimesFinishLoadTime;
+    } else if (metric == "firstPaintTime") {
+        feature = UseCounter::ChromeLoadTimesFirstPaintTime;
+    } else if (metric == "firstPaintAfterLoadTime") {
+        feature = UseCounter::ChromeLoadTimesFirstPaintAfterLoadTime;
+    } else if (metric == "navigationType") {
+        feature = UseCounter::ChromeLoadTimesNavigationType;
+    } else if (metric == "wasFetchedViaSpdy") {
+        feature = UseCounter::ChromeLoadTimesWasFetchedViaSpdy;
+    } else if (metric == "wasNpnNegotiated") {
+        feature = UseCounter::ChromeLoadTimesWasNpnNegotiated;
+    } else if (metric == "npnNegotiatedProtocol") {
+        feature = UseCounter::ChromeLoadTimesNpnNegotiatedProtocol;
+    } else if (metric == "wasAlternateProtocolAvailable") {
+        feature = UseCounter::ChromeLoadTimesWasAlternateProtocolAvailable;
+    } else if (metric == "connectionInfo") {
+        feature = UseCounter::ChromeLoadTimesConnectionInfo;
+    }
+    UseCounter::count(frame(), feature);
+}
+
 } // namespace blink

third_party/WebKit/Source/web/WebLocalFrameImpl.h

@@ -241,6 +241,7 @@ public:
     void copyImageAt(const WebPoint&) override;
     void saveImageAt(const WebPoint&) override;
     void clearActiveFindMatch() override;
+    void usageCountChromeLoadTimes(const WebString& metric) override;
 
     // WebFrameImplBase methods:
     void initializeCoreFrame(FrameHost*, FrameOwner*, const AtomicString& name, const AtomicString& uniqueName) override;

third_party/WebKit/public/web/WebLocalFrame.h

@@ -405,6 +405,10 @@ public:
     // coordinates.
     virtual void saveImageAt(const WebPoint&) = 0;
 
+    // TEMP: Usage count for chrome.loadtimes deprecation.
+    // This will be removed following the deprecation.
+    virtual void usageCountChromeLoadTimes(const WebString& metric) = 0;
+
 protected:
     explicit WebLocalFrame(WebTreeScopeType scope) : WebFrame(scope) { }
 

tools/metrics/histograms/histograms.xml

@@ -78073,6 +78073,20 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <int value="1483" label="StarInTimingAllowOrigin"/>
   <int value="1484" label="SVGSMILAdditiveAnimation"/>
   <int value="1485" label="SendBeaconWithNonSimpleContentType"/>
+  <int value="1486" label="ChromeLoadTimesRequestTime"/>
+  <int value="1487" label="ChromeLoadTimesStartLoadTime"/>
+  <int value="1488" label="ChromeLoadTimesCommitLoadTime"/>
+  <int value="1489" label="ChromeLoadTimesFinishDocumentLoadTime"/>
+  <int value="1490" label="ChromeLoadTimesFinishLoadTime"/>
+  <int value="1491" label="ChromeLoadTimesFirstPaintTime"/>
+  <int value="1492" label="ChromeLoadTimesFirstPaintAfterLoadTime"/>
+  <int value="1493" label="ChromeLoadTimesNavigationType"/>
+  <int value="1494" label="ChromeLoadTimesWasFetchedViaSpdy"/>
+  <int value="1495" label="ChromeLoadTimesWasNpnNegotiated"/>
+  <int value="1496" label="ChromeLoadTimesNpnNegotiatedProtocol"/>
+  <int value="1497" label="ChromeLoadTimesWasAlternateProtocolAvailable"/>
+  <int value="1498" label="ChromeLoadTimesConnectionInfo"/>
+  <int value="1499" label="ChromeLoadTimesUnknown"/>
 </enum>
 
 <enum name="FetchRequestMode" type="int">