Implement device-ram client hints header

third_party/WebKit/Source/core/loader/FrameFetchContextTest.cpp

Index: third_party/WebKit/Source/core/loader/FrameFetchContextTest.cpp
diff --git a/third_party/WebKit/Source/core/loader/FrameFetchContextTest.cpp b/third_party/WebKit/Source/core/loader/FrameFetchContextTest.cpp
index 96ab8d11ce312f6a715b734d6a92788f2519922d..c829a04f5375a7ab903282bb03ba27e9d0feee8a 100644
--- a/third_party/WebKit/Source/core/loader/FrameFetchContextTest.cpp
+++ b/third_party/WebKit/Source/core/loader/FrameFetchContextTest.cpp
@@ -521,6 +521,18 @@ class FrameFetchContextHintsTest : public FrameFetchContextTest {
   }
 };
 
+TEST_F(FrameFetchContextHintsTest, MonitorDeviceRamHints) {

[panicker, 2017/05/05 17:19:30]

Also add a unittest with different values of physical ram (include edge cases)
to test the computed value

[fmeawad, 2017/05/23 20:50:54]

Done.

+  ExpectHeader("http://www.example.com/1.gif", "device-ram", false, "");
+  ClientHintsPreferences preferences;
+  preferences.SetShouldSendDeviceRam(true);
+  document->GetClientHintsPreferences().UpdateFrom(preferences);
+  ExpectHeader("http://www.example.com/1.gif", "device-ram", true, "4");
+  dummy_page_holder->GetPage().SetDeviceScaleFactorDeprecated(2.5);
+  ExpectHeader("http://www.example.com/1.gif", "device-ram", true, "2.5");
+  ExpectHeader("http://www.example.com/1.gif", "Width", false, "");
+  ExpectHeader("http://www.example.com/1.gif", "Viewport-Width", false, "");
+}
+
 TEST_F(FrameFetchContextHintsTest, MonitorDPRHints) {
   ExpectHeader("http://www.example.com/1.gif", "DPR", false, "");
   ClientHintsPreferences preferences;
@@ -561,15 +573,18 @@ TEST_F(FrameFetchContextHintsTest, MonitorViewportWidthHints) {
 }
 
 TEST_F(FrameFetchContextHintsTest, MonitorAllHints) {
+  ExpectHeader("http://www.example.com/1.gif", "device-ram", false, "");
   ExpectHeader("http://www.example.com/1.gif", "DPR", false, "");
   ExpectHeader("http://www.example.com/1.gif", "Viewport-Width", false, "");
   ExpectHeader("http://www.example.com/1.gif", "Width", false, "");
 
   ClientHintsPreferences preferences;
+  preferences.SetShouldSendDeviceRam(true);
   preferences.SetShouldSendDPR(true);
   preferences.SetShouldSendResourceWidth(true);
   preferences.SetShouldSendViewportWidth(true);
   document->GetClientHintsPreferences().UpdateFrom(preferences);
+  ExpectHeader("http://www.example.com/1.gif", "device-ram", true, "4");
   ExpectHeader("http://www.example.com/1.gif", "DPR", true, "1");
   ExpectHeader("http://www.example.com/1.gif", "Width", true, "400", 400);
   ExpectHeader("http://www.example.com/1.gif", "Viewport-Width", true, "500");