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 e89e4d1a72ecbde388a176f5bc0a73fdea12f441..6fd385a4aabd318457cba21534a11c5cbfeb13d4 100644
--- a/third_party/WebKit/Source/core/loader/FrameFetchContextTest.cpp
+++ b/third_party/WebKit/Source/core/loader/FrameFetchContextTest.cpp
@@ -523,6 +523,23 @@ class FrameFetchContextHintsTest : public FrameFetchContextTest {
   }
 };
 
+TEST_F(FrameFetchContextHintsTest, MonitorDeviceRamHints) {
+  ExpectHeader("http://www.example.com/1.gif", "device-ram", false, "");
+  ClientHintsPreferences preferences;
+  preferences.SetShouldSendDeviceRam(true);
+  document->GetClientHintsPreferences().UpdateFrom(preferences);
+  Platform::Current()->SetDevicePhysicalMemoryMBForTesting(4096);
+  ExpectHeader("http://www.example.com/1.gif", "device-ram", true, "4");
+  Platform::Current()->SetDevicePhysicalMemoryMBForTesting(2048);
+  ExpectHeader("http://www.example.com/1.gif", "device-ram", true, "2");
+  Platform::Current()->SetDevicePhysicalMemoryMBForTesting(64385);
+  ExpectHeader("http://www.example.com/1.gif", "device-ram", true, "32");
+  Platform::Current()->SetDevicePhysicalMemoryMBForTesting(768);
+  ExpectHeader("http://www.example.com/1.gif", "device-ram", true, "0.5");
+  ExpectHeader("http://www.example.com/1.gif", "Width", false, "");
+  ExpectHeader("http://www.example.com/1.gif", "Viewport-Width", false, "");

[panicker, 2017/05/24 17:27:20]

Maybe drop Viewport-Width, Width?

[fmeawad, 2017/05/24 18:24:57]

Actually we need to make sure we are not setting any other client header.

+}
+
 TEST_F(FrameFetchContextHintsTest, MonitorDPRHints) {
   ExpectHeader("http://www.example.com/1.gif", "DPR", false, "");
   ClientHintsPreferences preferences;
@@ -563,20 +580,43 @@ 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);
+  Platform::Current()->SetDevicePhysicalMemoryMBForTesting(4096);
   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");
 }
 
+TEST_F(FrameFetchContextHintsTest, ClientHintsDeviceRam) {
+  EXPECT_EQ(0.125, FrameFetchContext::ClientHintsDeviceRam(128));  // 128MB
+  EXPECT_EQ(0.25, FrameFetchContext::ClientHintsDeviceRam(256));   // 256MB
+  EXPECT_EQ(0.25, FrameFetchContext::ClientHintsDeviceRam(510));   // <512MB
+  EXPECT_EQ(0.5, FrameFetchContext::ClientHintsDeviceRam(512));    // 512MB
+  EXPECT_EQ(0.5, FrameFetchContext::ClientHintsDeviceRam(640));    // 512+128MB
+  EXPECT_EQ(0.5, FrameFetchContext::ClientHintsDeviceRam(768));    // 512+256MB
+  EXPECT_EQ(0.5, FrameFetchContext::ClientHintsDeviceRam(1000));   // <1GB
+  EXPECT_EQ(1, FrameFetchContext::ClientHintsDeviceRam(1024));     // 1GB
+  EXPECT_EQ(1, FrameFetchContext::ClientHintsDeviceRam(1536));     // 1.5GB
+  EXPECT_EQ(1, FrameFetchContext::ClientHintsDeviceRam(2000));     // <2GB
+  EXPECT_EQ(2, FrameFetchContext::ClientHintsDeviceRam(2048));     // 2GB
+  EXPECT_EQ(4, FrameFetchContext::ClientHintsDeviceRam(5120));     // 5GB
+  EXPECT_EQ(8, FrameFetchContext::ClientHintsDeviceRam(8192));     // 8GB
+  EXPECT_EQ(16, FrameFetchContext::ClientHintsDeviceRam(16384));   // 16GB
+  EXPECT_EQ(32, FrameFetchContext::ClientHintsDeviceRam(32768));   // 32GB
+  EXPECT_EQ(32, FrameFetchContext::ClientHintsDeviceRam(64385));   // <64GB
+}
+
 TEST_F(FrameFetchContextTest, MainResourceCachePolicy) {
   // Default case
   ResourceRequest request("http://www.example.com");