Android: adds test intents for memory pressure.

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

Index: base/android/java/src/org/chromium/base/MemoryPressureListener.java
diff --git a/base/android/java/src/org/chromium/base/MemoryPressureListener.java b/base/android/java/src/org/chromium/base/MemoryPressureListener.java
index 2189940d90415573b6c3cc79e3e03269c742da73..e6d2dfa673ca18cfbfaafb356ba4ea740b0600d1 100644
--- a/base/android/java/src/org/chromium/base/MemoryPressureListener.java
+++ b/base/android/java/src/org/chromium/base/MemoryPressureListener.java
@@ -16,7 +16,7 @@ import org.chromium.base.MemoryPressureLevelList;
  * It registers a ComponentCallbacks2 with the system, and dispatches into
  * native.
  */
-class MemoryPressureListener {
+public class MemoryPressureListener {
   @CalledByNative
   private static void registerSystemCallback(Context context) {
       context.registerComponentCallbacks(
@@ -37,6 +37,13 @@ class MemoryPressureListener {
           });
   }
 
+  /**
+   * Used by applications to simulate a memory pressure signal.
+   */
+  public static void simulateMemoryPressureSignal(int level) {
+      nativeOnMemoryPressure(translate(level));
+  }
+
   private static int translate(int level) {
       if (level == ComponentCallbacks2.TRIM_MEMORY_COMPLETE) {
           return MemoryPressureLevelList.MEMORY_PRESSURE_CRITICAL;