[scheduler] Add unthrottled-by-blockable task queue to fix touch latency regression.

third_party/WebKit/Source/core/dom/TaskRunnerHelper.cpp

Index: third_party/WebKit/Source/core/dom/TaskRunnerHelper.cpp
diff --git a/third_party/WebKit/Source/core/dom/TaskRunnerHelper.cpp b/third_party/WebKit/Source/core/dom/TaskRunnerHelper.cpp
index 5cece113001eea219e23994abc6170e34b7e46ed..6d110254d6864f69dbed79fe7da6e9c5d611548f 100644
--- a/third_party/WebKit/Source/core/dom/TaskRunnerHelper.cpp
+++ b/third_party/WebKit/Source/core/dom/TaskRunnerHelper.cpp
@@ -53,6 +53,10 @@ RefPtr<WebTaskRunner> TaskRunnerHelper::Get(TaskType type, LocalFrame* frame) {
     case TaskType::kWebGL:
     case TaskType::kUnspecedTimer:
     case TaskType::kMiscPlatformAPI:
+      // TODO(altimin): Move all this tasks to suspendable or unthrottled

[Sami, 2017/05/22 12:14:44]

s/this/these/

[altimin, 2017/05/30 17:46:38]

Done.

+      // task runner.
+      return frame ? frame->FrameScheduler()->GeneralTaskRunner()
+                   : Platform::Current()->CurrentThread()->GetWebTaskRunner();
     case TaskType::kUnthrottled:
       return frame ? frame->FrameScheduler()->UnthrottledTaskRunner()
                    : Platform::Current()->CurrentThread()->GetWebTaskRunner();