SkCanvas::clear() should call down to devices even when the clip is empty.

tests/CanvasTest.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /*  Description:
  *      This test defines a series of elementatry test steps that perform
  *      a single or a small group of canvas API calls. Each test step is
@@ skipping 777 matching lines @@
 
     for (int testStep = 0; testStep < testStepArray().count(); testStep++) {
         TestOverrideStateConsistency(reporter, d, testStepArray()[testStep]);
         if (testStepArray()[testStep]->enablePdfTesting()) {
             TestPdfDevice(reporter, d, testStepArray()[testStep]);
         }
     }
 
     test_newraster(reporter);
 }
+
+// Make sure SkCanvas passes clear() calls down to its devices even when they're clipped out.
+DEF_TEST(Canvas_clear, reporter) {
+    SkBitmap bm;
+    bm.allocN32Pixels(1,1);
+
+    SkCanvas canvas(bm);
+    canvas.clear(SK_ColorRED);
+    REPORTER_ASSERT(reporter, SK_ColorRED == bm.getColor(0,0));
+
+    canvas.clipRect(SkRect::MakeEmpty());
+    canvas.clear(SK_ColorGREEN);
+    REPORTER_ASSERT(reporter, SK_ColorGREEN == bm.getColor(0,0));
+}