Add PartialLowEndModeOnMidRangeDevices flag: disable memory saving mode in V8 on devices with less than 1 GB of RAM.

build/patches/Add-PartialLowEndModeOnMidRangeDevices-flag.patch

@@ -7,8 +7,9 @@ adds a new flag in chrome://flags to re-enable the experiment
 License: GPL-2.0-or-later - https://spdx.org/licenses/GPL-2.0-or-later.html
 ---
  base/features.cc                                     |  4 ++++
+ content/renderer/render_process_impl.cc              |  9 +++++++++
  .../Add-PartialLowEndModeOnMidRangeDevices-flag.inc  | 12 ++++++++++++
- 2 files changed, 16 insertions(+)
+ 3 files changed, 25 insertions(+)
  create mode 100644 cromite_flags/chrome/browser/about_flags_cc/Add-PartialLowEndModeOnMidRangeDevices-flag.inc
 
 diff --git a/base/features.cc b/base/features.cc
@@ -25,6 +26,36 @@ diff --git a/base/features.cc b/base/features.cc
  void Init(EmitThreadControllerProfilerMetadata
                emit_thread_controller_profiler_metadata) {
    g_is_reduce_ppms_enabled.store(FeatureList::IsEnabled(kReducePPMs),
+diff --git a/content/renderer/render_process_impl.cc b/content/renderer/render_process_impl.cc
+--- a/content/renderer/render_process_impl.cc
++++ b/content/renderer/render_process_impl.cc
+@@ -7,6 +7,7 @@
+ #pragma allow_unsafe_libc_calls
+ #endif
+ 
++#include "base/features.h"
+ #include "content/renderer/render_process_impl.h"
+ 
+ #include "build/build_config.h"
+@@ -127,10 +128,18 @@ RenderProcessImpl::RenderProcessImpl()
+       base::CommandLine::ForCurrentProcess()->HasSwitch(
+           switches::kDisallowV8FeatureFlagOverrides);
+   if (!disallow_v8_feature_flag_overrides) {
++#if BUILDFLAG(IS_ANDROID)
++    if (base::SysInfo::IsLowEndDevice()
++          && base::FeatureList::IsEnabled(base::features::kPartialLowEndModeOnMidRangeDevices)) {
++      std::string_view optimize_flag("--optimize-for-size");
++      v8::V8::SetFlagsFromString(optimize_flag.data(), optimize_flag.size());
++    }
++#else
+     if (base::SysInfo::IsLowEndDevice()) {
+       std::string_view optimize_flag("--optimize-for-size");
+       v8::V8::SetFlagsFromString(optimize_flag.data(), optimize_flag.size());
+     }
++#endif
+ 
+     ////////////////////////////////////////////////////////////////////////////
+     // V8 flags are typically set in gin/v8_initializer.cc. Only those flags
 diff --git a/cromite_flags/chrome/browser/about_flags_cc/Add-PartialLowEndModeOnMidRangeDevices-flag.inc b/cromite_flags/chrome/browser/about_flags_cc/Add-PartialLowEndModeOnMidRangeDevices-flag.inc
 new file mode 100644
 --- /dev/null