[Android] Add a low-end device mode override flag

base/android/java/src/org/chromium/base/SysUtils.java

Index: base/android/java/src/org/chromium/base/SysUtils.java
diff --git a/base/android/java/src/org/chromium/base/SysUtils.java b/base/android/java/src/org/chromium/base/SysUtils.java
index 6c2ef5f19665dbc0c54ab44dc6d66a6da0fafa3a..0b39c0ef8f7809177d9681ff4b99febd90f379c5 100644
--- a/base/android/java/src/org/chromium/base/SysUtils.java
+++ b/base/android/java/src/org/chromium/base/SysUtils.java
@@ -15,6 +15,9 @@ import android.content.Context;
 import android.os.Build;
 import android.util.Log;
 
+import org.chromium.base.BaseSwitches;
+import org.chromium.base.CommandLine;
+
 /**
  * Exposes system related information about the current device.
  */
@@ -98,10 +101,23 @@ public class SysUtils {
      */
     @CalledByNative
     public static boolean isLowEndDevice() {
-        if (Build.VERSION.SDK_INT <= ANDROID_LOW_MEMORY_ANDROID_SDK_THRESHOLD) {
-            return false;
-        }
-        if (sLowEndDevice == null) {
+        while (sLowEndDevice == null) {

[bulach, 2013/11/20 16:31:12]

not quite sure why use a loop here?

[jdduke (slow), 2013/11/20 18:16:34]

Only for ease of breaking upon |sLowEndDevice| initialization. I can switch to a
simple return model instead.

+            if (CommandLine.isInitialized()) {
+                if (CommandLine.getInstance().hasSwitch(BaseSwitches.ENABLE_LOW_END_DEVICE_MODE)) {
+                    sLowEndDevice = true;
+                    break;
+                }
+                if (CommandLine.getInstance().hasSwitch(BaseSwitches.DISABLE_LOW_END_DEVICE_MODE)) {
+                    sLowEndDevice = false;
+                    break;
+                }
+            }
+
+            if (Build.VERSION.SDK_INT <= ANDROID_LOW_MEMORY_ANDROID_SDK_THRESHOLD) {
+                sLowEndDevice = false;
+                break;
+            }
+
             int ramSizeKB = amountOfPhysicalMemoryKB();
             sLowEndDevice = (ramSizeKB > 0 &&
                     ramSizeKB / 1024 < ANDROID_LOW_MEMORY_DEVICE_THRESHOLD_MB);