Initial CL for Data Saver (Flywheel) prompt when cellular network detected

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index 7f41b7f2bcae79c6519c8e376d453503e43fae94..f016253378a3672a715f37b533aee8b0cf63fa6c 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -189,13 +189,13 @@ const Experiment::Choice kNaClDebugMaskChoices[] = {
 #endif
 
 const Experiment::Choice kMarkNonSecureAsChoices[] = {
-    { IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", "" },
-    { IDS_MARK_NON_SECURE_AS_NEUTRAL,
-        switches::kMarkNonSecureAs, switches::kMarkNonSecureAsNeutral},
-    { IDS_MARK_NON_SECURE_AS_NON_SECURE,
-        switches::kMarkNonSecureAs, switches::kMarkNonSecureAsNonSecure},
-    { IDS_MARK_NON_SECURE_AS_DUBIOUS,
-        switches::kMarkNonSecureAs, switches::kMarkNonSecureAsDubious}
+  { IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", "" },
+  { IDS_MARK_NON_SECURE_AS_NEUTRAL,
+      switches::kMarkNonSecureAs, switches::kMarkNonSecureAsNeutral},
+  { IDS_MARK_NON_SECURE_AS_NON_SECURE,
+      switches::kMarkNonSecureAs, switches::kMarkNonSecureAsNonSecure},
+  { IDS_MARK_NON_SECURE_AS_DUBIOUS,
+      switches::kMarkNonSecureAs, switches::kMarkNonSecureAsDubious}
 };
 
 const Experiment::Choice kMaxTilesForInterestAreaChoices[] = {
@@ -308,19 +308,19 @@ const Experiment::Choice kEnableGpuRasterizationChoices[] = {
 
 #if defined(OS_CHROMEOS)
 const Experiment::Choice kMemoryPressureThresholdChoices[] = {
-    { IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", "" },
-    { IDS_FLAGS_CONSERVATIVE_THRESHOLDS,
-      chromeos::switches::kMemoryPressureThresholds,
-      chromeos::switches::kConservativeThreshold },
-    { IDS_FLAGS_AGGRESSIVE_CACHE_DISCARD_THRESHOLDS,
-      chromeos::switches::kMemoryPressureThresholds,
-      chromeos::switches::kAggressiveCacheDiscardThreshold },
-    { IDS_FLAGS_AGGRESSIVE_TAB_DISCARD_THRESHOLDS,
-      chromeos::switches::kMemoryPressureThresholds,
-      chromeos::switches::kAggressiveTabDiscardThreshold },
-    { IDS_FLAGS_AGGRESSIVE_THRESHOLDS,
-      chromeos::switches::kMemoryPressureThresholds,
-      chromeos::switches::kAggressiveThreshold },
+  { IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", "" },
+  { IDS_FLAGS_CONSERVATIVE_THRESHOLDS,
+    chromeos::switches::kMemoryPressureThresholds,
+    chromeos::switches::kConservativeThreshold },
+  { IDS_FLAGS_AGGRESSIVE_CACHE_DISCARD_THRESHOLDS,
+    chromeos::switches::kMemoryPressureThresholds,
+    chromeos::switches::kAggressiveCacheDiscardThreshold },
+  { IDS_FLAGS_AGGRESSIVE_TAB_DISCARD_THRESHOLDS,
+    chromeos::switches::kMemoryPressureThresholds,
+    chromeos::switches::kAggressiveTabDiscardThreshold },
+  { IDS_FLAGS_AGGRESSIVE_THRESHOLDS,
+    chromeos::switches::kMemoryPressureThresholds,
+    chromeos::switches::kAggressiveThreshold },
 };
 #endif
 
@@ -393,6 +393,19 @@ const Experiment::Choice kFillOnAccountSelectChoices[] = {
     autofill::switches::kEnableFillOnAccountSelectNoHighlighting, "" },
 };
 
+#if defined(OS_CHROMEOS)
+const Experiment::Choice kDataSaverPromptChoices[] = {
+  { IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", "" },
+  { IDS_GENERIC_EXPERIMENT_CHOICE_DISABLED,
+    chromeos::switches::kDisableDataSaverPrompt, "" },
+  { IDS_GENERIC_EXPERIMENT_CHOICE_ENABLED,
+    chromeos::switches::kEnableDataSaverPrompt, "" },
+  { IDS_FLAGS_DATASAVER_PROMPT_DEMO_MODE,
+    chromeos::switches::kEnableDataSaverPrompt,
+    chromeos::switches::kDataSaverPromptDemoMode },
+};
+#endif
+
 // RECORDING USER METRICS FOR FLAGS:
 // -----------------------------------------------------------------------------
 // The first line of the experiment is the internal name. If you'd like to
@@ -2185,6 +2198,15 @@ const Experiment kExperiments[] = {
         switches::kSyncServiceURL,
         "https://chrome-sync.sandbox.google.com/chrome-sync/alpha")
   },
+#if defined(OS_CHROMEOS)
+  {
+    "enable-datasaver-prompt",
+    IDS_FLAGS_DATASAVER_PROMPT_NAME,
+    IDS_FLAGS_DATASAVER_PROMPT_DESCRIPTION,
+    kOsCrOS,
+    MULTI_VALUE_TYPE(kDataSaverPromptChoices)
+  },
+#endif  // defined(OS_CHROMEOS)
 
   // NOTE: Adding new command-line switches requires adding corresponding
   // entries to enum "LoginCustomFlags" in histograms.xml. See note in