Disable hardware acceleration for ChromeActivities on low-end devices.

chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java b/chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java
index 52b22c66c2924360d0d4eb5c67eaff0157e89ea0..94e85cd9c92b01e6c14148c746ef234207429922 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java
@@ -34,6 +34,7 @@ import android.view.ViewStub;
 import android.view.ViewTreeObserver;
 import android.view.ViewTreeObserver.OnPreDrawListener;
 import android.view.Window;
+import android.view.WindowManager;
 import android.view.accessibility.AccessibilityManager;
 import android.view.accessibility.AccessibilityManager.AccessibilityStateChangeListener;
 import android.view.accessibility.AccessibilityManager.TouchExplorationStateChangeListener;
@@ -42,6 +43,7 @@ import org.chromium.base.ApiCompatibilityUtils;
 import org.chromium.base.BaseSwitches;
 import org.chromium.base.CommandLine;
 import org.chromium.base.Log;
+import org.chromium.base.SysUtils;
 import org.chromium.base.ThreadUtils;
 import org.chromium.base.TraceEvent;
 import org.chromium.base.VisibleForTesting;
@@ -339,6 +341,8 @@ public abstract class ChromeActivity extends AsyncInitializationActivity
 
         mCompositorViewHolder = (CompositorViewHolder) findViewById(R.id.compositor_view_holder);
         mCompositorViewHolder.setRootView(getWindow().getDecorView().getRootView());
+
+        enableHardwareAcceleration();
     }
 
     /**
@@ -1450,4 +1454,11 @@ public abstract class ChromeActivity extends AsyncInitializationActivity
 
     @Override
     public void onSceneChange(Layout layout) { }
+
+    private void enableHardwareAcceleration() {
+        // HW acceleration is disabled in the manifest. Enable it only on high-end devices.
+        if (!SysUtils.isLowEndDevice()) {
+            getWindow().addFlags(WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED);
+        }
+    }
 }