Expose kForwardMemoryPressureEventsToGpuProcess in content_features.h

Expose kForwardMemoryPressureEventsToGpuProcess in content_features.h
so that it can more easily be used by Chromium hosts.

Bug: 1048924
Change-Id: I911f44b0274be30d5b33b01a0ec2c338417920a9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2036801Reviewed-by: Avi Drissman <avi@chromium.org>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Commit-Queue: Rafael Cintron <rafael.cintron@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#738452}

content/browser/gpu/gpu_process_host.cc

@@ -52,6 +52,7 @@
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/gpu_utils.h"
 #include "content/public/common/content_client.h"
+#include "content/public/common/content_features.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/result_codes.h"
 #include "content/public/common/sandboxed_process_launcher_delegate.h"
@@ -151,19 +152,6 @@ int GetForgiveMinutes(gpu::GpuMode gpu_mode) {
              : kForgiveGpuCrashMinutes;
 }
 
-#if !defined(OS_ANDROID)
-// Feature controlling whether or not memory pressure signals will be forwarded
-// to the GPU process.
-const base::Feature kForwardMemoryPressureEventsToGpuProcess{
-  "ForwardMemoryPressureEventsToGpuProcess",
-#if defined(OS_FUCHSIA)
-      base::FEATURE_ENABLED_BY_DEFAULT
-#else
-      base::FEATURE_DISABLED_BY_DEFAULT
-#endif
-};
-#endif
-
 // This matches base::TerminationStatus.
 // These values are persisted to logs. Entries (except MAX_ENUM) should not be
 // renumbered and numeric values should never be reused. Should also avoid
@@ -678,8 +666,8 @@ GpuProcessHost::GpuProcessHost(int host_id, GpuProcessKind kind)
     in_process_ = true;
   }
 #if !defined(OS_ANDROID)
-  if (!in_process_ &&
-      base::FeatureList::IsEnabled(kForwardMemoryPressureEventsToGpuProcess)) {
+  if (!in_process_ && base::FeatureList::IsEnabled(
+                          features::kForwardMemoryPressureEventsToGpuProcess)) {
     memory_pressure_listener_ =
         std::make_unique<base::MemoryPressureListener>(base::BindRepeating(
             &GpuProcessHost::OnMemoryPressure, base::Unretained(this)));

content/public/common/content_features.cc

@@ -202,6 +202,19 @@ const base::Feature kFontSrcLocalMatching{"FontSrcLocalMatching",
 const base::Feature kForcedColors{"ForcedColors",
                                   base::FEATURE_DISABLED_BY_DEFAULT};
 
+#if !defined(OS_ANDROID)
+// Feature controlling whether or not memory pressure signals will be forwarded
+// to the GPU process.
+const base::Feature kForwardMemoryPressureEventsToGpuProcess {
+  "ForwardMemoryPressureEventsToGpuProcess",
+#if defined(OS_FUCHSIA)
+      base::FEATURE_ENABLED_BY_DEFAULT
+#else
+      base::FEATURE_DISABLED_BY_DEFAULT
+#endif
+};
+#endif
+
 // Enables scrollers inside Blink to store scroll offsets in fractional
 // floating-point numbers rather than truncating to integers.
 const base::Feature kFractionalScrollOffsets{"FractionalScrollOffsets",

content/public/common/content_features.h

@@ -55,6 +55,10 @@ CONTENT_EXPORT extern const base::Feature kFeaturePolicyForClientHints;
 CONTENT_EXPORT extern const base::Feature kFeaturePolicyForSandbox;
 CONTENT_EXPORT extern const base::Feature kFontSrcLocalMatching;
 CONTENT_EXPORT extern const base::Feature kForcedColors;
+#if !defined(OS_ANDROID)
+CONTENT_EXPORT extern const base::Feature
+    kForwardMemoryPressureEventsToGpuProcess;
+#endif
 CONTENT_EXPORT extern const base::Feature kFractionalScrollOffsets;
 CONTENT_EXPORT extern const base::Feature kFtpProtocol;
 CONTENT_EXPORT extern const base::Feature kHistoryManipulationIntervention;