Optimize for speed Android performance sensitive functions.

Set optimize_max compiler options to build some hot blink render
components and improve size-vs-speed balance on Android.

Pixel4 Aarch32/64:
+628Kb/+884Kb libchrome size
+6.9%/+5.7% speedometer2 speed

Bug: 1125115

Binary-Size: Will revert this after perf graphs show impact of it.
Change-Id: I45e176ae1cbc2e513eda986b667ce65640ec9a2a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2390778
Commit-Queue: Pavel Iliin <Pavel.Iliin@arm.com>
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/master@{#804555}

third_party/blink/renderer/core/animation/BUILD.gn

@@ -276,6 +276,11 @@ blink_core_sources("animation") {
     "worklet_animation_controller.h",
   ]
 
+  if (is_android && !is_debug) {
+    configs -= [ "//build/config/compiler:default_optimization" ]
+    configs += [ "//build/config/compiler:optimize_max" ]
+  }
+
   deps = [ ":buildflags" ]
 }
 

third_party/blink/renderer/core/css/BUILD.gn

@@ -593,6 +593,10 @@ blink_core_sources("css") {
     "vision_deficiency.h",
     "zoom_adjusted_pixel_value.h",
   ]
+  if (is_android && !is_debug) {
+    configs -= [ "//build/config/compiler:default_optimization" ]
+    configs += [ "//build/config/compiler:optimize_max" ]
+  }
 }
 
 blink_core_tests("unit_tests") {

third_party/blink/renderer/core/dom/BUILD.gn

@@ -309,6 +309,13 @@ blink_core_sources("dom") {
     "xml_document.h",
   ]
 
+  # TODO(pavel.iliin) hot path functions separtion into "dom_hotpath" is not
+  # required anymore. Combine them with "dom" sources.
+  if (is_android && !is_debug) {
+    configs -= [ "//build/config/compiler:default_optimization" ]
+    configs += [ "//build/config/compiler:optimize_max" ]
+  }
+
   public_deps = [
     "//third_party/blink/public/mojom:mojom_core_blink",
 

third_party/blink/renderer/core/frame/BUILD.gn

@@ -223,6 +223,11 @@ blink_core_sources("frame") {
     "window_or_worker_global_scope.h",
   ]
 
+  if (is_android && !is_debug) {
+    configs -= [ "//build/config/compiler:default_optimization" ]
+    configs += [ "//build/config/compiler:optimize_max" ]
+  }
+
   deps = [
     "//skia",
     "//ui/accessibility:ax_base",

third_party/blink/renderer/core/html/BUILD.gn

@@ -598,6 +598,11 @@ blink_core_sources("html") {
     "window_name_collection.h",
   ]
 
+  if (is_android && !is_debug) {
+    configs -= [ "//build/config/compiler:default_optimization" ]
+    configs += [ "//build/config/compiler:optimize_max" ]
+  }
+
   deps = [
     "//services/metrics/public/cpp:metrics_cpp",
     "//skia:skcms",

third_party/blink/renderer/core/layout/BUILD.gn

@@ -648,6 +648,11 @@ blink_core_sources("layout") {
     ]
   }
 
+  if (is_android && !is_debug) {
+    configs -= [ "//build/config/compiler:default_optimization" ]
+    configs += [ "//build/config/compiler:optimize_max" ]
+  }
+
   if (is_fuchsia) {
     sources += [ "layout_theme_fuchsia.cc" ]
   }

third_party/blink/renderer/core/paint/BUILD.gn

@@ -265,4 +265,8 @@ blink_core_sources("paint") {
     "view_painter.cc",
     "view_painter.h",
   ]
+  if (!is_debug && is_android) {
+    configs -= [ "//build/config/compiler:default_optimization" ]
+    configs += [ "//build/config/compiler:optimize_max" ]
+  }
 }

third_party/blink/renderer/platform/heap/BUILD.gn

@@ -113,7 +113,7 @@ blink_platform_sources("heap") {
     "//v8",
   ]
 
-  if (!is_debug && !optimize_for_size) {
+  if (!is_debug && (!optimize_for_size || is_android)) {
     configs -= [ "//build/config/compiler:default_optimization" ]
     configs += [ "//build/config/compiler:optimize_max" ]
   }

third_party/blink/renderer/platform/wtf/BUILD.gn

@@ -242,7 +242,7 @@ component("wtf") {
     sources -= [ "text/atomic_string_cf.cc" ]
   }
 
-  if (!is_debug && !optimize_for_size) {
+  if (!is_debug && (!optimize_for_size || is_android)) {
     configs -= [ "//build/config/compiler:default_optimization" ]
     configs += [ "//build/config/compiler:optimize_max" ]
   }