diff --git a/include/gui/ConsumerBase.h b/include/gui/ConsumerBase.h
index 78a3608..8a7545d 100644
--- a/include/gui/ConsumerBase.h
+++ b/include/gui/ConsumerBase.h
@@ -89,6 +89,18 @@
     // buffers from the given BufferQueue.
     ConsumerBase(const sp<BufferQueue> &bufferQueue);
 
+    // onLastStrongRef gets called by RefBase just before the dtor of the most
+    // derived class.  It is used to clean up the buffers so that ConsumerBase
+    // can coordinate the clean-up by calling into virtual methods implemented
+    // by the derived classes.  This would not be possible from the
+    // ConsuemrBase dtor because by the time that gets called the derived
+    // classes have already been destructed.
+    //
+    // This methods should not need to be overridden by derived classes, but
+    // if they are overridden the ConsumerBase implementation must be called
+    // from the derived class.
+    virtual void onLastStrongRef(const void* id);
+
     // Implementation of the BufferQueue::ConsumerListener interface.  These
     // calls are used to notify the ConsumerBase of asynchronous events in the
     // BufferQueue.  These methods should not need to be overridden by derived
diff --git a/libs/gui/ConsumerBase.cpp b/libs/gui/ConsumerBase.cpp
index 8694d21..4937b17 100644
--- a/libs/gui/ConsumerBase.cpp
+++ b/libs/gui/ConsumerBase.cpp
@@ -76,7 +76,18 @@
 }
 
 ConsumerBase::~ConsumerBase() {
-	CB_LOGV("~ConsumerBase");
+    CB_LOGV("~ConsumerBase");
+    Mutex::Autolock lock(mMutex);
+
+    // Verify that abandon() has been called before we get here.  This should
+    // be done by ConsumerBase::onLastStrongRef(), but it's possible for a
+    // derived class to override that method and not call
+    // ConsumerBase::onLastStrongRef().
+    LOG_ALWAYS_FATAL_IF(!mAbandoned, "[%s] ~ConsumerBase was called, but the "
+        "consumer is not abandoned!", mName.string());
+}
+
+void ConsumerBase::onLastStrongRef(const void* id) {
     abandon();
 }
 
diff --git a/libs/gui/tests/SurfaceTextureClient_test.cpp b/libs/gui/tests/SurfaceTextureClient_test.cpp
index ce96036..7376b4c 100644
--- a/libs/gui/tests/SurfaceTextureClient_test.cpp
+++ b/libs/gui/tests/SurfaceTextureClient_test.cpp
@@ -178,21 +178,21 @@
     EXPECT_EQ(EGL_SUCCESS, eglGetError());
 
     EGLBoolean success = eglMakeCurrent(mEglDisplay, eglSurface, eglSurface, mEglContext);
-    EXPECT_EQ(EGL_TRUE, success);
+    EXPECT_TRUE(success);
 
     glClear(GL_COLOR_BUFFER_BIT);
     success = eglSwapBuffers(mEglDisplay, eglSurface);
-    EXPECT_EQ(EGL_TRUE, success);
+    EXPECT_TRUE(success);
 
     mST->abandon();
 
     glClear(GL_COLOR_BUFFER_BIT);
     success = eglSwapBuffers(mEglDisplay, eglSurface);
-    EXPECT_EQ(EGL_FALSE, success);
+    EXPECT_FALSE(success);
     EXPECT_EQ(EGL_BAD_SURFACE, eglGetError());
 
     success = eglMakeCurrent(mEglDisplay, mEglSurface, mEglSurface, mEglContext);
-    ASSERT_EQ(EGL_TRUE, success);
+    ASSERT_TRUE(success);
 
     if (eglSurface != EGL_NO_SURFACE) {
         eglDestroySurface(mEglDisplay, eglSurface);
diff --git a/libs/gui/tests/SurfaceTexture_test.cpp b/libs/gui/tests/SurfaceTexture_test.cpp
index 2d30305..84ec7f2 100644
--- a/libs/gui/tests/SurfaceTexture_test.cpp
+++ b/libs/gui/tests/SurfaceTexture_test.cpp
@@ -716,18 +716,18 @@
     glViewport(0, 0, texWidth, texHeight);
     drawTexture();
 
-    EXPECT_TRUE(checkPixel( 0,  0, 255, 127, 255, 255));
-    EXPECT_TRUE(checkPixel(63,  0,   0, 133,   0, 255));
-    EXPECT_TRUE(checkPixel(63, 65,   0, 133,   0, 255));
-    EXPECT_TRUE(checkPixel( 0, 65, 255, 127, 255, 255));
+    EXPECT_TRUE(checkPixel( 0,  0, 255, 127, 255, 255, 3));
+    EXPECT_TRUE(checkPixel(63,  0,   0, 133,   0, 255, 3));
+    EXPECT_TRUE(checkPixel(63, 65,   0, 133,   0, 255, 3));
+    EXPECT_TRUE(checkPixel( 0, 65, 255, 127, 255, 255, 3));
 
-    EXPECT_TRUE(checkPixel(22, 44, 255, 127, 255, 255));
-    EXPECT_TRUE(checkPixel(45, 52, 255, 127, 255, 255));
-    EXPECT_TRUE(checkPixel(52, 51,  98, 255,  73, 255));
-    EXPECT_TRUE(checkPixel( 7, 31, 155,   0, 118, 255));
-    EXPECT_TRUE(checkPixel(31,  9, 107,  24,  87, 255));
-    EXPECT_TRUE(checkPixel(29, 35, 255, 127, 255, 255));
-    EXPECT_TRUE(checkPixel(36, 22, 155,  29,   0, 255));
+    EXPECT_TRUE(checkPixel(22, 44, 255, 127, 255, 255, 3));
+    EXPECT_TRUE(checkPixel(45, 52, 255, 127, 255, 255, 3));
+    EXPECT_TRUE(checkPixel(52, 51,  98, 255,  73, 255, 3));
+    EXPECT_TRUE(checkPixel( 7, 31, 155,   0, 118, 255, 3));
+    EXPECT_TRUE(checkPixel(31,  9, 107,  24,  87, 255, 3));
+    EXPECT_TRUE(checkPixel(29, 35, 255, 127, 255, 255, 3));
+    EXPECT_TRUE(checkPixel(36, 22, 155,  29,   0, 255, 3));
 }
 
 TEST_F(SurfaceTextureGLTest, TexturingFromCpuFilledYV12BufferPow2) {