FileAPI: Rename *OnFileThread to *OnFileTaskRunner

This renames *OnFileThread methods to *OnFileTaskRunner because now they run
not on FILE thread but on file_task_runner. And also adds some DCHECK for
checking valid task_runner into SandboxFileSystemBackendDelegate.


BUG=n/a
TEST=n/a
[email protected],[email protected]

Review URL: https://codereview.chromium.org/101393006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@242072 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/content/public/test/test_file_system_backend.cc b/content/public/test/test_file_system_backend.cc
index bdc63b2..d1c2bc8 100644
--- a/content/public/test/test_file_system_backend.cc
+++ b/content/public/test/test_file_system_backend.cc
@@ -61,7 +61,7 @@
   virtual ~QuotaUtil() {}
 
   // FileSystemQuotaUtil overrides.
-  virtual base::PlatformFileError DeleteOriginDataOnFileThread(
+  virtual base::PlatformFileError DeleteOriginDataOnFileTaskRunner(
       FileSystemContext* context,
       quota::QuotaManagerProxy* proxy,
       const GURL& origin_url,
@@ -78,20 +78,20 @@
     return scoped_refptr<QuotaReservation>();
   }
 
-  virtual void GetOriginsForTypeOnFileThread(
+  virtual void GetOriginsForTypeOnFileTaskRunner(
       FileSystemType type,
       std::set<GURL>* origins) OVERRIDE {
     NOTREACHED();
   }
 
-  virtual void GetOriginsForHostOnFileThread(
+  virtual void GetOriginsForHostOnFileTaskRunner(
       FileSystemType type,
       const std::string& host,
       std::set<GURL>* origins) OVERRIDE {
     NOTREACHED();
   }
 
-  virtual int64 GetOriginUsageOnFileThread(
+  virtual int64 GetOriginUsageOnFileTaskRunner(
       FileSystemContext* context,
       const GURL& origin_url,
       FileSystemType type) OVERRIDE {