cc: Make tiling interest rect calc based on viewport.

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 5d0fe27d9213cc4de7f51cadd9d6f991188b5e3a..45838aa46c2d3356c28347216ffb71080fd42ad5 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -215,16 +215,16 @@ const Experiment::Choice kMarkNonSecureAsChoices[] = {
         switches::kMarkNonSecureAs, switches::kMarkNonSecureAsDubious}
 };
 
-const Experiment::Choice kMaxTilesForInterestAreaChoices[] = {
-  { IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", "" },
-  { IDS_FLAGS_MAX_TILES_FOR_INTEREST_AREA_SHORT,
-    cc::switches::kMaxTilesForInterestArea, "64"},
-  { IDS_FLAGS_MAX_TILES_FOR_INTEREST_AREA_TALL,
-    cc::switches::kMaxTilesForInterestArea, "128"},
-  { IDS_FLAGS_MAX_TILES_FOR_INTEREST_AREA_GRANDE,
-    cc::switches::kMaxTilesForInterestArea, "256"},
-  { IDS_FLAGS_MAX_TILES_FOR_INTEREST_AREA_VENTI,
-    cc::switches::kMaxTilesForInterestArea, "512"}
+const Experiment::Choice kTilingInterestAreaViewportMultiplier[] = {
+  { IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", ""},
+  { IDS_FLAGS_VIEWPORT_MULTIPLIER_SHORT,
+    cc::switches::kTilingInterestAreaViewportMultiplier,"3"},
+  { IDS_FLAGS_VIEWPORT_MULTIPLIER_TALL,
+    cc::switches::kTilingInterestAreaViewportMultiplier,"9"},
+  { IDS_FLAGS_VIEWPORT_MULTIPLIER_GRANDE,
+    cc::switches::kTilingInterestAreaViewportMultiplier,"25"},
+  { IDS_FLAGS_VIEWPORT_MULTIPLIER_VENTI,
+    cc::switches::kTilingInterestAreaViewportMultiplier,"49"}
 };
 
 const Experiment::Choice kShowSavedCopyChoices[] = {
@@ -1313,11 +1313,11 @@ const Experiment kExperiments[] = {
   },
 #endif
   {
-    "max-tiles-for-interest-area",
-    IDS_FLAGS_MAX_TILES_FOR_INTEREST_AREA_NAME,
-    IDS_FLAGS_MAX_TILES_FOR_INTEREST_AREA_DESCRIPTION,
+    "tiling-interest-area-viewport-multiplier",
+    IDS_FLAGS_VIEWPORT_MULTIPLIER_NAME,
+    IDS_FLAGS_VIEWPORT_MULTIPLIER_DESCRIPTION,
     kOsAll,
-    MULTI_VALUE_TYPE(kMaxTilesForInterestAreaChoices)
+    MULTI_VALUE_TYPE(kTilingInterestAreaViewportMultiplier)
   },
   {
     "enable-offer-store-unmasked-wallet-cards",