Don't trigger HW acceleration from Toasts on low-end devices.

chrome/android/javatests/src/org/chromium/chrome/browser/hardware_acceleration/Utils.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/hardware_acceleration/Utils.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/hardware_acceleration/Utils.java b/chrome/android/javatests/src/org/chromium/chrome/browser/hardware_acceleration/Utils.java
index 0bf5896eb78dd707b7c50828a7bd8b9b39031d4a..b8789b7a2448b0c01d42d828179aa0b9c58881a0 100644
--- a/chrome/android/javatests/src/org/chromium/chrome/browser/hardware_acceleration/Utils.java
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/hardware_acceleration/Utils.java
@@ -13,6 +13,7 @@ import org.chromium.base.SysUtils;
 import org.chromium.base.ThreadUtils;
 import org.chromium.chrome.browser.ChromeActivity;
 import org.chromium.content.browser.test.util.CallbackHelper;
+import org.chromium.ui.widget.Toast;
 
 import java.util.HashSet;
 import java.util.Set;
@@ -28,6 +29,19 @@ public class Utils {
      * I.e. on low-end devices hardware acceleration must be off.
      */
     public static void assertHardwareAcceleration(final ChromeActivity activity) throws Exception {
+        assertActivityAcceleration(activity);
+        assertToastAcceleration(activity);
+    }
+
+    /**
+     * Asserts that there is no thread named 'RenderThread' (which is essential
+     * for hardware acceleration).
+     */
+    public static void assertNoRenderThread() {
+        Assert.assertFalse(collectThreadNames().contains("RenderThread"));
+    }
+
+    private static void assertActivityAcceleration(final ChromeActivity activity) throws Exception {
         final AtomicBoolean accelerated = new AtomicBoolean();
         final CallbackHelper listenerCalled = new CallbackHelper();
 
@@ -49,7 +63,34 @@ public class Utils {
         });
 
         listenerCalled.waitForCallback(0);
+        assertAcceleration(accelerated);
+    }
+
+    private static void assertToastAcceleration(final ChromeActivity activity)
+            throws Exception {
+        final AtomicBoolean accelerated = new AtomicBoolean();
+        final CallbackHelper listenerCalled = new CallbackHelper();
+
+        ThreadUtils.postOnUiThread(new Runnable() {
+            @Override
+            public void run() {
+                Toast toast = new Toast(activity);
+                toast.setView(new View(activity) {
+                    @Override
+                    public void onAttachedToWindow() {
+                        accelerated.set(isHardwareAccelerated());
+                        listenerCalled.notifyCalled();
+                    }
+                });
+                toast.show();
+            }
+        });
+
+        listenerCalled.waitForCallback(0);
+        assertAcceleration(accelerated);
+    }
 
+    private static void assertAcceleration(AtomicBoolean accelerated) {
         if (SysUtils.isLowEndDevice()) {
             Assert.assertFalse(accelerated.get());
         } else {
@@ -57,14 +98,6 @@ public class Utils {
         }
     }
 
-    /**
-     * Asserts that there is no thread named 'RenderThread' (which is essential
-     * for hardware acceleration).
-     */
-    public static void assertNoRenderThread() {
-        Assert.assertFalse(collectThreadNames().contains("RenderThread"));
-    }
-
     private static Set<String> collectThreadNames() {
         Set<String> names = new HashSet<String>();
         for (Thread thread : Thread.getAllStackTraces().keySet()) {