Adding unit test for DrawingBuffer's bitmap recycling mechanism

content/test/test_blink_web_unit_test_support.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/test/test_blink_web_unit_test_support.h"
 
 #include "base/feature_list.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/path_service.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/platform_thread.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
 #include "cc/blink/web_layer_impl.h"
+#include "cc/test/test_shared_bitmap_manager.h"
 #include "cc/trees/layer_tree_settings.h"
 #include "content/child/web_url_loader_impl.h"
 #include "content/test/mock_webclipboard_impl.h"
 #include "content/test/web_gesture_curve_mock.h"
 #include "media/base/media.h"
 #include "net/cookies/cookie_monster.h"
 #include "storage/browser/database/vfs_backend.h"
 #include "third_party/WebKit/public/platform/WebConnectionType.h"
 #include "third_party/WebKit/public/platform/WebData.h"
 #include "third_party/WebKit/public/platform/WebPluginListBuilder.h"
@@ skipping 80 matching lines @@
     // created before this initialization because some tests need specific kinds
     // of message loops, and their types are not known upfront. Some tests also
     // create their own thread bundles or message loops, and doing the same in
     // TestBlinkWebUnitTestSupport would introduce a conflict.
     dummy_task_runner = make_scoped_refptr(new DummyTaskRunner());
     dummy_task_runner_handle.reset(
         new base::ThreadTaskRunnerHandle(dummy_task_runner));
   }
   renderer_scheduler_ = blink::scheduler::CreateRendererSchedulerForTests();
   web_thread_ = renderer_scheduler_->CreateMainThread();
+  shared_bitmap_manager_.reset(new cc::TestSharedBitmapManager);
 
   // Set up a FeatureList instance, so that code using that API will not hit a
   // an error that it's not set. Cleared by ClearInstanceForTesting() below.
   base::FeatureList::SetInstance(base::WrapUnique(new base::FeatureList));
 
   blink::initialize(this);
   blink::setLayoutTestMode(true);
   blink::WebRuntimeFeatures::enableDatabase(true);
   blink::WebRuntimeFeatures::enableNotifications(true);
   blink::WebRuntimeFeatures::enableTouch(true);
@@ skipping 62 matching lines @@
   // This loader should be used only for process-local resources such as
   // data URLs.
   blink::WebURLLoader* default_loader = new WebURLLoaderImpl(nullptr, nullptr);
   return url_loader_factory_->createURLLoader(default_loader);
 }
 
 blink::WebString TestBlinkWebUnitTestSupport::userAgent() {
   return blink::WebString::fromUTF8("test_runner/0.0.0.0");
 }
 
+std::unique_ptr<cc::SharedBitmap>
+TestBlinkWebUnitTestSupport::allocateSharedBitmap(
+    const blink::WebSize& size) {
+  return shared_bitmap_manager_
+      ->AllocateSharedBitmap(gfx::Size(size.width, size.height));
+}
+
 blink::WebString TestBlinkWebUnitTestSupport::queryLocalizedString(
     blink::WebLocalizedString::Name name) {
   // Returns placeholder strings to check if they are correctly localized.
   switch (name) {
     case blink::WebLocalizedString::OtherDateLabel:
       return base::ASCIIToUTF16("<<OtherDateLabel>>");
     case blink::WebLocalizedString::OtherMonthLabel:
       return base::ASCIIToUTF16("<<OtherMonthLabel>>");
     case blink::WebLocalizedString::OtherTimeLabel:
       return base::ASCIIToUTF16("<<OtherTimeLabel>>");
@@ skipping 121 matching lines @@
 blink::WebRTCCertificateGenerator*
 TestBlinkWebUnitTestSupport::createRTCCertificateGenerator() {
 #if defined(ENABLE_WEBRTC)
   return new TestWebRTCCertificateGenerator();
 #else
   return nullptr;
 #endif
 }
 
 }  // namespace content