Remove parts of //cc we aren't using

cc/base/blocking_task_runner.h

Index: cc/base/blocking_task_runner.h
diff --git a/cc/trees/blocking_task_runner.h b/cc/base/blocking_task_runner.h
similarity index 93%
rename from cc/trees/blocking_task_runner.h
rename to cc/base/blocking_task_runner.h
index eb43b91441cc7320ea34e2f5f7cb26ab27b4708c..f74e21f5b73d4cccc601d3fa2eb04ac70dfd97d3 100644
--- a/cc/trees/blocking_task_runner.h
+++ b/cc/base/blocking_task_runner.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CC_TREES_BLOCKING_TASK_RUNNER_H_
-#define CC_TREES_BLOCKING_TASK_RUNNER_H_
+#ifndef CC_BASE_BLOCKING_TASK_RUNNER_H_
+#define CC_BASE_BLOCKING_TASK_RUNNER_H_
 
 #include <vector>
 
@@ -12,7 +12,6 @@
 #include "base/single_thread_task_runner.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/platform_thread.h"
-#include "cc/base/cc_export.h"
 
 namespace cc {
 
@@ -41,7 +40,7 @@ namespace cc {
 //
 // Beware of re-entrancy, make sure the CapturePostTasks object is destroyed at
 // a time when it makes sense for the embedder to call arbitrary things.
-class CC_EXPORT BlockingTaskRunner {
+class BlockingTaskRunner {
  public:
   // Creates a BlockingTaskRunner for a given SingleThreadTaskRunner.
   // |task_runner| will be used to run the tasks which are posted while we are
@@ -55,7 +54,7 @@ class CC_EXPORT BlockingTaskRunner {
   // While an object of this type is held alive on a thread, any tasks
   // posted to the thread will be captured and run as soon as the object
   // is destroyed, shortcutting past the task runner.
-  class CC_EXPORT CapturePostTasks {
+  class CapturePostTasks {
    public:
     explicit CapturePostTasks(BlockingTaskRunner* blocking_runner);
     ~CapturePostTasks();
@@ -95,4 +94,4 @@ class CC_EXPORT BlockingTaskRunner {
 
 }  // namespace cc
 
-#endif  // CC_TREES_BLOCKING_TASK_RUNNER_H_
+#endif  // CC_BASE_BLOCKING_TASK_RUNNER_H_