DoLockForWrite    392 cc/resources/resource_provider.cc   locked_canvas_ = DoLockForWrite();
DoLockForWrite    464 cc/resources/resource_provider.h     virtual SkCanvas* DoLockForWrite() = 0;
DoLockForWrite    481 cc/resources/resource_provider.h     virtual SkCanvas* DoLockForWrite() OVERRIDE;
DoLockForWrite    500 cc/resources/resource_provider.h     virtual SkCanvas* DoLockForWrite() OVERRIDE;