Missing RunPendingTasks for parser blocking XML parser.

With BlockHTMLParserOnStyleSheets enabled, these unit tests needed
RunPendingTasks calls to resume and finish the blocked parsing.

Bug: 891767
Change-Id: Ie65a0ec884b70208bbbf2290ab86aa67684819bc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2014454Reviewed-by: Anders Hartvoll Ruud <andruud@chromium.org>
Commit-Queue: Rune Lillesveen <futhark@chromium.org>
Cr-Commit-Position: refs/heads/master@{#735829}

third_party/blink/renderer/core/frame/document_loading_rendering_test.cc

@@ -118,6 +118,7 @@ TEST_F(DocumentLoadingRenderingTest,
 
   // Sheet finishes loading, but no documentElement yet so don't resume.
   css_resource.Complete("a { color: red; }");
+  test::RunPendingTasks();
   EXPECT_TRUE(Compositor().DeferMainFrameUpdate());
 
   // Root inserted so resume.
@@ -155,6 +156,7 @@ TEST_F(DocumentLoadingRenderingTest, ShouldResumeCommitsAfterSheetsLoadForXml) {
 
   // Sheet finished, so resume commits.
   css_resource.Finish();
+  test::RunPendingTasks();
   EXPECT_FALSE(Compositor().DeferMainFrameUpdate());
 }
 

third_party/blink/renderer/core/svg/graphics/svg_image_test.cc

@@ -46,6 +46,7 @@ class SVGImageTest : public testing::Test {
     observer_ = MakeGarbageCollected<PauseControlImageObserver>(should_pause);
     image_ = SVGImage::Create(observer_);
     image_->SetData(SharedBuffer::Create(data, strlen(data)), true);
+    test::RunPendingTasks();
   }
 
   void LoadUsingFileName(const String& file_name) {
@@ -56,6 +57,7 @@ class SVGImageTest : public testing::Test {
     observer_ = MakeGarbageCollected<PauseControlImageObserver>(true);
     image_ = SVGImage::Create(observer_);
     image_->SetData(image_data, true);
+    test::RunPendingTasks();
   }
 
   void PumpFrame() {